Proposals
Below are some proposals for talks from the past (and current). By clicking on the ID number, more details are shown. By default, these are sorted chronologically (recent first) and by then by last name. The data can be sorted by alternate means by using the links at the top right, each allowing ascending or descending orders.
Displaying 301-320 of 471 results.
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ID:
505
Year: 2018
Name: Mitchel T. Keller
Institution: Morningside College
Subject area(s): Mathematical writing/publishing
Title of Talk: PreTeXt: One Input, Many Beautiful Outputs
Abstract: In this talk, we will take a look at some of the features of PreTeXt (formerly MathBook XML), which is a language designed for authors to be able to use a master source file to produce a variety of output formats. A PreTeXt source file marks up the structure of the document (theorems, proofs, exercises, examples, figures, etc.) using an XML syntax that may remind users of HTML, but with a total focus on structure and not presentation. Mathematical expressions in the source are marked up using LaTeX notation. Support for including a variety of interactive elements in the document is available, with additional interactive features planned. While most existing PreTeXt projects are book-length, the system is now mature and stable enough that interested individuals are encouraged to use it for developing materials for their courses, regardless of whether they might eventually develop into a larger project. PreTeXt source files are easily converted to HTML that looks good on both desktops and mobile devices and LaTeX for producing print versions. A conversion from PreTeXt to the EPUB format used by Apple's iBooks is under development, and a PreTeXt to Kindle conversion will follow. The speaker is the author of one open-source text written in PreTeXt (Applied Combinatorics with W.T. Trotter), co-editor of the PreTeXt edition of Bogart's Combinatorics through Guided Discovery (with Oscar Levin and Kent E. Morrison), Production Editor for Active Calculus by Boelkins et al., and is a core member of the group guiding further development of PreTeXt.
Year: 2018
Name: Mitchel T. Keller
Institution: Morningside College
Subject area(s): Mathematical writing/publishing
Title of Talk: PreTeXt: One Input, Many Beautiful Outputs
Abstract: In this talk, we will take a look at some of the features of PreTeXt (formerly MathBook XML), which is a language designed for authors to be able to use a master source file to produce a variety of output formats. A PreTeXt source file marks up the structure of the document (theorems, proofs, exercises, examples, figures, etc.) using an XML syntax that may remind users of HTML, but with a total focus on structure and not presentation. Mathematical expressions in the source are marked up using LaTeX notation. Support for including a variety of interactive elements in the document is available, with additional interactive features planned. While most existing PreTeXt projects are book-length, the system is now mature and stable enough that interested individuals are encouraged to use it for developing materials for their courses, regardless of whether they might eventually develop into a larger project. PreTeXt source files are easily converted to HTML that looks good on both desktops and mobile devices and LaTeX for producing print versions. A conversion from PreTeXt to the EPUB format used by Apple's iBooks is under development, and a PreTeXt to Kindle conversion will follow. The speaker is the author of one open-source text written in PreTeXt (Applied Combinatorics with W.T. Trotter), co-editor of the PreTeXt edition of Bogart's Combinatorics through Guided Discovery (with Oscar Levin and Kent E. Morrison), Production Editor for Active Calculus by Boelkins et al., and is a core member of the group guiding further development of PreTeXt.
ID:
564
Year: 2021
Name: Mitchel Keller
Institution: Morningside University
Subject area(s): Undergraduate mathematics teaching, inquiry-based learning
Title of Talk: Implementing a Class Journal in a Small Upper-Division IBL Course
Abstract: In Fall 2020, I made a change to my upper-division IBL modern geometries course by making publishing in and refereeing for a class journal a significant part of the students' class grade. In this model, a student (or small group of students) who present a proof of a result in class submit a typed proof of the result to a class journal. The paper is then refereed and ultimately published. My first two iterations of this (including real analysis in Spring 2021) proved less successful than I had hoped, and I felt like part of the reason was having fewer than 10 students in my classes was partially at fault. I was not deterred. This fall, I am teaching Modern Algebra I using a class journal, and adjustments made appear to be paying off. In this talk, I will discuss the models that I have used, the struggles I encountered during the 2020–2021 academic year, and the changes made for Fall 2021 that have made a positive impact.
Year: 2021
Name: Mitchel Keller
Institution: Morningside University
Subject area(s): Undergraduate mathematics teaching, inquiry-based learning
Title of Talk: Implementing a Class Journal in a Small Upper-Division IBL Course
Abstract: In Fall 2020, I made a change to my upper-division IBL modern geometries course by making publishing in and refereeing for a class journal a significant part of the students' class grade. In this model, a student (or small group of students) who present a proof of a result in class submit a typed proof of the result to a class journal. The paper is then refereed and ultimately published. My first two iterations of this (including real analysis in Spring 2021) proved less successful than I had hoped, and I felt like part of the reason was having fewer than 10 students in my classes was partially at fault. I was not deterred. This fall, I am teaching Modern Algebra I using a class journal, and adjustments made appear to be paying off. In this talk, I will discuss the models that I have used, the struggles I encountered during the 2020–2021 academic year, and the changes made for Fall 2021 that have made a positive impact.
ID:
286
Year: 2010
Name: Jitka Stehnova
Institution: Mt. Mercy College
Subject area(s): Number Theory, Representation Theory
Title of Talk: Representation Theory
Abstract: In this talk, we first give an introduction to the representation theory of p-adic groups. We will then focus on the subset of unitary groups, specifically U(1,1) and U(2) and show a process of parametrization of irreducible admissible supercuspidal representations.
Year: 2010
Name: Jitka Stehnova
Institution: Mt. Mercy College
Subject area(s): Number Theory, Representation Theory
Title of Talk: Representation Theory
Abstract: In this talk, we first give an introduction to the representation theory of p-adic groups. We will then focus on the subset of unitary groups, specifically U(1,1) and U(2) and show a process of parametrization of irreducible admissible supercuspidal representations.
ID:
46
Year: 2004
Name: Charles Ashbacher
Institution: Mt. Mercy College
Subject area(s): Number theory
Title of Talk: Not All Numbers Are Beautiful
Abstract: In his forthcoming book,
Year: 2004
Name: Charles Ashbacher
Institution: Mt. Mercy College
Subject area(s): Number theory
Title of Talk: Not All Numbers Are Beautiful
Abstract: In his forthcoming book,
ID:
153
Year: 2006
Name: Charles Ashbacher
Institution: Mt. Mercy College
Subject area(s): Number theory
Title of Talk: Some Properties of the Smarandache Fitorial and Supplementary Fitorial Functions
Abstract: The Smarandache Fitorial function FI(N) is defined as the product of all the positive integers less than N that are relatively prime to N and the Smarandache Supplementary Fitorial function SFI(N) as the product of all the positive integers less than or equal to N that are not relatively prime to N. It is clear that FI(N) * SFI(N) = N!. These functions are defined in the book
Year: 2006
Name: Charles Ashbacher
Institution: Mt. Mercy College
Subject area(s): Number theory
Title of Talk: Some Properties of the Smarandache Fitorial and Supplementary Fitorial Functions
Abstract: The Smarandache Fitorial function FI(N) is defined as the product of all the positive integers less than N that are relatively prime to N and the Smarandache Supplementary Fitorial function SFI(N) as the product of all the positive integers less than or equal to N that are not relatively prime to N. It is clear that FI(N) * SFI(N) = N!. These functions are defined in the book
ID:
325
Year: 2012
Name: Jitka Stehnova
Institution: Mt. Mercy University
Subject area(s): Grants for Math
Title of Talk: Pi Day, STEM MNOS and ExploreU@MMU
Abstract: Last year, our department was able to secure funding for several different events and programs supporting mathematics on various levels. In this talk, I will talk about these programs, funding opportunities and grant writing.
Year: 2012
Name: Jitka Stehnova
Institution: Mt. Mercy University
Subject area(s): Grants for Math
Title of Talk: Pi Day, STEM MNOS and ExploreU@MMU
Abstract: Last year, our department was able to secure funding for several different events and programs supporting mathematics on various levels. In this talk, I will talk about these programs, funding opportunities and grant writing.
ID:
382
Year: 2014
Name: a m fink
Institution: none
Subject area(s):
Title of Talk: complex roots of polynomials and why it pays to talk mathematics
Abstract: For quadratic polynomials, a negative discriminant is a criteria for non real roots. Is there one for nth degree polynomials? Sure,and I found it because I talked to someone who pointed the way.
Year: 2014
Name: a m fink
Institution: none
Subject area(s):
Title of Talk: complex roots of polynomials and why it pays to talk mathematics
Abstract: For quadratic polynomials, a negative discriminant is a criteria for non real roots. Is there one for nth degree polynomials? Sure,and I found it because I talked to someone who pointed the way.
ID:
494
Year: 2017
Name: Matthew Graham
Institution: Northeastern Illinois University
Subject area(s):
Title of Talk: Promoting Out-of-Class Engagement Using Piazza
Abstract: This talk is aimed at sharing many lessons learned regarding how to promote quality out-of-class engagement. We discuss implementation of Piazza and online quizzes in a flipped "Introduction to Proofs" course taught over six terms across two Universities. We view this course as a communications course. Our students need to learn how to communicate Mathematics informally and formally both verbally and in written form. We have found the flipped structure allows for ample time for our students to learn how to communicate Mathematics informally as they discuss the various problems with classmates. We have also found that increasing the informal communication skills of our students usually doesn't correspond to an increase in their formal writing. We use Piazza as a way of providing massive amounts of formative assessment aimed at perfecting their formal writing skills and we use online quizzes both as reading quizzes and as flash cards to help students memorize and understand the definitions in the course.
Year: 2017
Name: Matthew Graham
Institution: Northeastern Illinois University
Subject area(s):
Title of Talk: Promoting Out-of-Class Engagement Using Piazza
Abstract: This talk is aimed at sharing many lessons learned regarding how to promote quality out-of-class engagement. We discuss implementation of Piazza and online quizzes in a flipped "Introduction to Proofs" course taught over six terms across two Universities. We view this course as a communications course. Our students need to learn how to communicate Mathematics informally and formally both verbally and in written form. We have found the flipped structure allows for ample time for our students to learn how to communicate Mathematics informally as they discuss the various problems with classmates. We have also found that increasing the informal communication skills of our students usually doesn't correspond to an increase in their formal writing. We use Piazza as a way of providing massive amounts of formative assessment aimed at perfecting their formal writing skills and we use online quizzes both as reading quizzes and as flash cards to help students memorize and understand the definitions in the course.
ID:
503
Year: 2018
Name: Justin Hoffmeier
Institution: Northwest Missouri State University
Subject area(s): Algebra
Title of Talk: Exact Zero Divisor Graphs
Abstract: Zero divisor graphs of rings identify the elements of the annihilators. Is it possible to identify the generators of the annihilators from these graphs? We work examples for which the answer is yes. Our explanation uses exact zero divisor graphs. For this talk, rings will be only the integers modulo n and we will assume very little background knowledge.
Year: 2018
Name: Justin Hoffmeier
Institution: Northwest Missouri State University
Subject area(s): Algebra
Title of Talk: Exact Zero Divisor Graphs
Abstract: Zero divisor graphs of rings identify the elements of the annihilators. Is it possible to identify the generators of the annihilators from these graphs? We work examples for which the answer is yes. Our explanation uses exact zero divisor graphs. For this talk, rings will be only the integers modulo n and we will assume very little background knowledge.
ID:
520
Year: 2018
Name: Laura McCauley
Institution: Peru State College
Subject area(s): Graph Theory
Title of Talk: Spot It! with Combinatorics
Abstract: The game of Spot It! consists of 55 game cards, each card has 8 symbols, and each pair of cards has exactly one symbol in common. The idea is to 'spot' the match on your card before the other players 'spot' their match. There are many ways to approach the mathematics behind designing a game of Spot It!. Different fields of mathematics are considered and applied to the problem, ultimately resulting in a beautiful interconnectedness within concepts of Combinatorics.
Year: 2018
Name: Laura McCauley
Institution: Peru State College
Subject area(s): Graph Theory
Title of Talk: Spot It! with Combinatorics
Abstract: The game of Spot It! consists of 55 game cards, each card has 8 symbols, and each pair of cards has exactly one symbol in common. The idea is to 'spot' the match on your card before the other players 'spot' their match. There are many ways to approach the mathematics behind designing a game of Spot It!. Different fields of mathematics are considered and applied to the problem, ultimately resulting in a beautiful interconnectedness within concepts of Combinatorics.
ID:
569
Year: 2021
Name: fpkonknrz uuEDLRaXwRxj
Institution: PiZiaywrPvCbUWk
Subject area(s): dyhNGEhkRvX
Title of Talk: PrnGztILsXtiHZgrG
Abstract: uQyxdz tcasmqfoyqzl, [url=http://yiemusmfoehv.com/]yiemusmfoehv[/url], [link=http://ribieozvmfqs.com/]ribieozvmfqs[/link], http://dojdkzctkcts.com/
Year: 2021
Name: fpkonknrz uuEDLRaXwRxj
Institution: PiZiaywrPvCbUWk
Subject area(s): dyhNGEhkRvX
Title of Talk: PrnGztILsXtiHZgrG
Abstract: uQyxdz tcasmqfoyqzl, [url=http://yiemusmfoehv.com/]yiemusmfoehv[/url], [link=http://ribieozvmfqs.com/]ribieozvmfqs[/link], http://dojdkzctkcts.com/
ID:
175
Year: 2006
Name: Jim Tattersall
Institution: Providence College
Subject area(s): History of Mathematics
Title of Talk: Episodes in The Early History of The Lucasian Chair
Abstract: In 1663, Henry Lucas, the long-time secretary to the Chancellor of the University of Cambridge, made a bequest, subsequently granted by Charles II, to endow a chair in mathematics. A number of conditions were attached to the Chair. Among the more prominent Lucasian professors were Newton, Babbage, Stokes, Dirac, and Hawking. We focus attention on the early Lucasians. Many of whom were very diligent in carrying out their Lucasian responsibilities but as history has shown such was not always the case. In the process, we uncover several untold stories and some interesting mathematics
Year: 2006
Name: Jim Tattersall
Institution: Providence College
Subject area(s): History of Mathematics
Title of Talk: Episodes in The Early History of The Lucasian Chair
Abstract: In 1663, Henry Lucas, the long-time secretary to the Chancellor of the University of Cambridge, made a bequest, subsequently granted by Charles II, to endow a chair in mathematics. A number of conditions were attached to the Chair. Among the more prominent Lucasian professors were Newton, Babbage, Stokes, Dirac, and Hawking. We focus attention on the early Lucasians. Many of whom were very diligent in carrying out their Lucasian responsibilities but as history has shown such was not always the case. In the process, we uncover several untold stories and some interesting mathematics
ID:
176
Year: 2006
Name: Jim Tattersall
Institution: Providence College
Subject area(s): History of Mathematics
Title of Talk: Vignettes in Number Theory
Abstract: Properties and the history of several numbers that lend themselves naturally to undergraduate research projects will be discussed. Topics include Demlo numbers, polite numbers, sad numbers, decimal Columbian numbers, Smith numbers, and Niven numbers.
Year: 2006
Name: Jim Tattersall
Institution: Providence College
Subject area(s): History of Mathematics
Title of Talk: Vignettes in Number Theory
Abstract: Properties and the history of several numbers that lend themselves naturally to undergraduate research projects will be discussed. Topics include Demlo numbers, polite numbers, sad numbers, decimal Columbian numbers, Smith numbers, and Niven numbers.
ID:
557
Year: 2021
Name: sdjpnrulo HLmaHvVkmcvnAycMLTb
Institution: QYkWFmEaCLlh
Subject area(s): DsznTtoTtJGjxvaz
Title of Talk: bjNsnuTbptcndRLh
Abstract: iKacRZ fpgzwzpxuynd, [url=http://lezdexaqmjlh.com/]lezdexaqmjlh[/url], [link=http://yktzyhxmvubq.com/]yktzyhxmvubq[/link], http://zgtcidytaknq.com/
Year: 2021
Name: sdjpnrulo HLmaHvVkmcvnAycMLTb
Institution: QYkWFmEaCLlh
Subject area(s): DsznTtoTtJGjxvaz
Title of Talk: bjNsnuTbptcndRLh
Abstract: iKacRZ fpgzwzpxuynd, [url=http://lezdexaqmjlh.com/]lezdexaqmjlh[/url], [link=http://yktzyhxmvubq.com/]yktzyhxmvubq[/link], http://zgtcidytaknq.com/
ID:
462
Year: 2016
Name: ypmvqq ypmvqq
Institution: raCweZrhMNjKxbics
Subject area(s): UvVwwTilpXhZkD
Title of Talk: VgMIpGhcdwlkdWXBUw
Abstract: LqvU33 ewqgylyyvvtc, [url=http://foqciatqtnfi.com/]foqciatqtnfi[/url], [link=http://uitmnsyixbuy.com/]uitmnsyixbuy[/link], http://evplpanuzgzt.com/
Year: 2016
Name: ypmvqq ypmvqq
Institution: raCweZrhMNjKxbics
Subject area(s): UvVwwTilpXhZkD
Title of Talk: VgMIpGhcdwlkdWXBUw
Abstract: LqvU33 ewqgylyyvvtc, [url=http://foqciatqtnfi.com/]foqciatqtnfi[/url], [link=http://uitmnsyixbuy.com/]uitmnsyixbuy[/link], http://evplpanuzgzt.com/
ID:
566
Year: 2021
Name: Zonghao Zou
Institution: Santa Clara University
Subject area(s):
Title of Talk: Helical trajectories of swimming cells with a flexible flagellar hook
Abstract: The flexibility of the bacterial flagellar hook is believed to have substantial consequences for microorganism locomotion. Using a simplified model of a rigid flagellum and a flexible hook, we show that the paths of axisymmetric cell bodies driven by a single flagellum in Stokes flow are generically helical. Phase-averaged resistance and mobility tensors are produced to describe the flagellar hydrodynamics, and a helical rod model which retains a coupling between translation and rotation is identified as a distinguished asymptotic limit. A supercritical Hopf bifurcation in the flagellar orientation beyond a critical ratio of flagellar motor torque to hook bending stiffness, which is set by the spontaneous curvature of the flexible hook, the shape of the cell body, and the flagellum geometry, can have a dramatic effect on the cell's trajectory through the fluid. Although the equilibrium hook angle can result in a wide variance in the trajectory's helical pitch, we find a very consistent prediction for the trajectory's helical amplitude using parameters relevant to swimming P. aeruginosa cells.
Year: 2021
Name: Zonghao Zou
Institution: Santa Clara University
Subject area(s):
Title of Talk: Helical trajectories of swimming cells with a flexible flagellar hook
Abstract: The flexibility of the bacterial flagellar hook is believed to have substantial consequences for microorganism locomotion. Using a simplified model of a rigid flagellum and a flexible hook, we show that the paths of axisymmetric cell bodies driven by a single flagellum in Stokes flow are generically helical. Phase-averaged resistance and mobility tensors are produced to describe the flagellar hydrodynamics, and a helical rod model which retains a coupling between translation and rotation is identified as a distinguished asymptotic limit. A supercritical Hopf bifurcation in the flagellar orientation beyond a critical ratio of flagellar motor torque to hook bending stiffness, which is set by the spontaneous curvature of the flexible hook, the shape of the cell body, and the flagellum geometry, can have a dramatic effect on the cell's trajectory through the fluid. Although the equilibrium hook angle can result in a wide variance in the trajectory's helical pitch, we find a very consistent prediction for the trajectory's helical amplitude using parameters relevant to swimming P. aeruginosa cells.
ID:
30
Year: 2004
Name: Frank Farris
Institution: Santa Clara University and Editor of Mathematics Magazine
Subject area(s): Geometry
Title of Talk: The Edge of the Universe--Hyperbolic Wallpaper
Abstract: The universe couldn't have an edge, because if it did, you could go there, put your hand through and find more of the universe on the other side, right? This reasoning breaks down if you and your measuring devices shrink as you approach the edge, making it infinitely far away. We show a mathematical model of such a universe, called the Poincare Upper Halfplane, and study some of its features. The classical topic of circle inversion plays a prominent role. Physics suggests that this turns out to be a cold and lonely place, but we make beautiful wallpaper for the inhabitants.
Year: 2004
Name: Frank Farris
Institution: Santa Clara University and Editor of Mathematics Magazine
Subject area(s): Geometry
Title of Talk: The Edge of the Universe--Hyperbolic Wallpaper
Abstract: The universe couldn't have an edge, because if it did, you could go there, put your hand through and find more of the universe on the other side, right? This reasoning breaks down if you and your measuring devices shrink as you approach the edge, making it infinitely far away. We show a mathematical model of such a universe, called the Poincare Upper Halfplane, and study some of its features. The classical topic of circle inversion plays a prominent role. Physics suggests that this turns out to be a cold and lonely place, but we make beautiful wallpaper for the inhabitants.
ID:
31
Year: 2004
Name: Frank Farris
Institution: Santa Clara University and Editor of Mathematics Magazine
Subject area(s): Geometry
Title of Talk: Forbidden Symmetry: Relaxing the Crystallographic Restriction
Abstract: If you look at enough swatches of wallpaper, you will see centers of 2-fold, 3-fold, 4-fold, and 6-fold rotation. Why not 5-fold centers? They cannot occur, according to the Crystallographic Restriction, a fundamental result about wallpaper patterns, which are defined to be invariant under two linearly independent translations. Even so, we offer convincing pictures that appear to show wallpapers with 5-fold symmetry. The talk is intended to be accessible to students who know something about level curves in the plane and linear algebra.
Year: 2004
Name: Frank Farris
Institution: Santa Clara University and Editor of Mathematics Magazine
Subject area(s): Geometry
Title of Talk: Forbidden Symmetry: Relaxing the Crystallographic Restriction
Abstract: If you look at enough swatches of wallpaper, you will see centers of 2-fold, 3-fold, 4-fold, and 6-fold rotation. Why not 5-fold centers? They cannot occur, according to the Crystallographic Restriction, a fundamental result about wallpaper patterns, which are defined to be invariant under two linearly independent translations. Even so, we offer convincing pictures that appear to show wallpapers with 5-fold symmetry. The talk is intended to be accessible to students who know something about level curves in the plane and linear algebra.
ID:
512
Year: 2018
Name: Katherine Vance
Institution: Simpson College
Subject area(s):
Title of Talk: Sine, Cosine, and Euler
Abstract: In mid-September, I attended a training workshop for the TRIUMPHS project. The goal of the project is to develop materials to teach core mathematical content using primary historical sources and active learning techniques. At the end of September, I site-tested one of the TRIUMPHS Primary Source Projects, ``The Derivatives of the Sine and Cosine Functions," in my Calculus 1 class. I will give a little bit of background on the TRIUMPHS project and share my experience as a site tester.
Year: 2018
Name: Katherine Vance
Institution: Simpson College
Subject area(s):
Title of Talk: Sine, Cosine, and Euler
Abstract: In mid-September, I attended a training workshop for the TRIUMPHS project. The goal of the project is to develop materials to teach core mathematical content using primary historical sources and active learning techniques. At the end of September, I site-tested one of the TRIUMPHS Primary Source Projects, ``The Derivatives of the Sine and Cosine Functions," in my Calculus 1 class. I will give a little bit of background on the TRIUMPHS project and share my experience as a site tester.
ID:
267
Year: 2009
Name: Martha Ellen Waggoner
Institution: Simpson College
Subject area(s): Teaching
Title of Talk: Using Toilet Paper to Help Students Make Generalizations
Abstract: When students are given a specific problem to solve, they do not naturally create a general solution method that could be applied in other situations. In this presentation, I will discuss a project that I use to help students learn the value of generalization and give them an introduction to sensitivity testing. The project starts by having students find the number of sheets of paper on a specific sealed roll of toilet paper, but they must take that method and produce a formula that could find the number of sheets of paper on a general roll of perforated paper. They then test the various models created by the class for sensitivity to measurement error to find the
Year: 2009
Name: Martha Ellen Waggoner
Institution: Simpson College
Subject area(s): Teaching
Title of Talk: Using Toilet Paper to Help Students Make Generalizations
Abstract: When students are given a specific problem to solve, they do not naturally create a general solution method that could be applied in other situations. In this presentation, I will discuss a project that I use to help students learn the value of generalization and give them an introduction to sensitivity testing. The project starts by having students find the number of sheets of paper on a specific sealed roll of toilet paper, but they must take that method and produce a formula that could find the number of sheets of paper on a general roll of perforated paper. They then test the various models created by the class for sensitivity to measurement error to find the