On Elliptic Curves, 2021 Missouri State University

#### On Elliptic Curves, Montana S. Miller

*MSU Graduate Theses*

An elliptic curve over the rational numbers is given by the equation *y ^{2} = x^{3}+Ax+B*. In our thesis, we study elliptic curves. It is known that the set of rational points on the elliptic curve form a finitely generated abelian group induced by the secant-tangent addition law. We present an elementary proof of associativity using Maple. We also present a relatively concise proof of the Mordell-Weil Theorem.

So How Were The Tents Of Israel Placed? A Bible-Inspired Geometric Problem, 2020 University of Texas at El Paso

#### So How Were The Tents Of Israel Placed? A Bible-Inspired Geometric Problem, Julio Urenda, Olga Kosheleva, Vladik Kreinovich

*Departmental Technical Reports (CS)*

In one of the Biblical stories, prophet Balaam blesses the tents of Israel for being good. But what can be so good about the tents? A traditional Rabbinical interpretation is that the placement of the tents provided full privacy: from each entrance, one could not see what is happening at any other entrance. This motivates a natural geometric question: how exactly were these tents placed? In this paper, we provide an answer to this question.

Sum Of Cubes Of The First N Integers, 2020 California State University, San Bernardino

#### Sum Of Cubes Of The First N Integers, Obiamaka L. Agu

*Electronic Theses, Projects, and Dissertations*

In Calculus we learned that Sum^{n}_{k=1} k = [n(n+1)]/2 , that Sum^{n}_{k=1} k^2 = [n(n+1)(2n+1)]/6 , and that Sum^{n}_{k=1} k^{3} = (n(n+1)/2)^{2}. These formulas are useful when solving for the area below quadratic or cubic function over an interval [a, b]. This tedious process, solving for areas under a quadratic or a cubic, served as motivation for the introduction of Riemman integrals. For the overzealous math student, these steps were replaced by a simpler method of evaluating antiderivatives at ...

Notes On Lie Sphere Geometry And The Cyclides Of Dupin, 2020 College of the Holy Cross

#### Notes On Lie Sphere Geometry And The Cyclides Of Dupin, Thomas E. Cecil

*Mathematics Department Faculty Scholarship*

In these notes, we give a detailed account of the method for studying Dupin hypersurfaces in * R^{n}* or

**using Lie sphere geometry, and we conclude with a classification of the cyclides of Dupin obtained by using this approach.**

*S*^{n}Specifically, an oriented hypersurface

**⊂**

*M*^{n−1}*is a cyclide of Dupin of characteristic (*

**R**^{n}*p,q*), where

*p*+

*q*=

*n*− 1, if

**has two distinct principal curvatures at each point with respective multiplicities p and q, and each principal curvature function is constant along each leaf of its corresponding principal foliation. We show that ...**

*M*^{n−1}Estimating The Number Of Discrete Models Of Biological Networks, 2020 Southern Methodist University

#### Estimating The Number Of Discrete Models Of Biological Networks, Brandilyn Stigler

*Annual Symposium on Biomathematics and Ecology Education and Research*

No abstract provided.

Application Of Tda Mapper To Water Data And Bird Data, 2020 University of Wisconsin - La Crosse

#### Application Of Tda Mapper To Water Data And Bird Data, Wako Bungula

*Annual Symposium on Biomathematics and Ecology Education and Research*

No abstract provided.

Weaving Mathematics, 2020 Ateneo de Manila University

#### Weaving Mathematics, Ma. Louise Antonette N. De Las Peñas

*Magisterial Lectures*

In this lecture, Dr. De las Peñas talks about the intersection of mathematics and Philippine indigenous weaving.

**Speaker: **

Ma. Louise Antonette N. De Las Peñas is a Professor at the Department of Mathematics and currently the Associate Dean for Research and Creative Work, Loyola Schools, Ateneo De Manila University, Philippines. Her research interests are discrete geometry, mathematical crystallography, group theory, and technology in mathematics education.

She is a recipient of several research awards including the National Research Council of the Philippines (NRCP) Achievement Award in the Mathematical Sciences and the Philippine Commission on Higher Education Republica National Research Award. She ...

Dupin Submanifolds In Lie Sphere Geometry (Updated Version), 2020 College of the Holy Cross

#### Dupin Submanifolds In Lie Sphere Geometry (Updated Version), Thomas E. Cecil, Shiing-Shen Chern

*Mathematics Department Faculty Scholarship*

A hypersurface ** M^{n-1}** in Euclidean space

*is proper Dupin if the number of distinct principal curvatures is constant on*

**E**^{n}**, and each principal curvature function is constant along each leaf of its principal foliation. This paper was originally published in 1989 (see Comments below), and it develops a method for the local study of proper Dupin hypersurfaces in the context of Lie sphere geometry using moving frames. This method has been effective in obtaining several classification theorems of proper Dupin hypersurfaces since that time. This updated version of the paper contains the original exposition together with ...**

*M*^{n-1}Topological And H^Q Equivalence Of Cyclic N-Gonal Actions On Riemann Surfaces - Part Ii, 2020 Rose-Hulman Institute of Technology

#### Topological And H^Q Equivalence Of Cyclic N-Gonal Actions On Riemann Surfaces - Part Ii, Sean A. Broughton

*Mathematical Sciences Technical Reports (MSTR)*

We consider conformal actions of the finite group *G *on a closed Riemann surface *S*, as well as algebraic actions of *G* on smooth, complete, algebraic curves over an arbitrary, algebraically closed field. There are several notions of equivalence of actions, the most studied of which is topological equivalence, because of its close relationship to the branch locus of moduli space. A second important equivalence relation is that induced by representation of *G* on spaces of holomorphic *q*-differentials. The notion of topological equivalence does not work well in positive characteristic. We shall discuss an alternative to topological equivalence, which ...

Macroharmony In Ligeti's Etudes, Book 3, 2020 The Graduate Center, City University of New York

#### Macroharmony In Ligeti's Etudes, Book 3, Nicolas Namoradze

*Dissertations, Theses, and Capstone Projects*

In Book 3 of his piano etudes, György Ligeti charts a new path relative not only to his earlier works in the genre, but also to the rest of his oeuvre. The treatment of pitch class collection (or “scale”) in particular is a significant departure from his previous compositional processes. Despite the extent of the stylistic shifts in the four etudes of Book 3 and their importance as capstones to Ligeti’s body of work, there is a dearth of literature dedicated to their analysis.

This essay seeks to show that in Book 3, Ligeti uses processes related to scale ...

The Künneth Formula And Applications, 2020 Chapman University

#### The Künneth Formula And Applications, Melissa Sugimoto

*SURF Posters and Papers*

The de Rham cohomology of a manifold is a homotopy invariant that expresses basic topological information about smooth manifolds. The q-th de Rham cohomology of the n-dimensional Euclidean space is the vector space defined by the closed q-forms over the exact q-forms. Furthermore, the support of a continuous function f on a topological space X is the closure of the set on which f is nonzero. The result of restricting the definition of the de Rham cohomology to functions with compact support is called the de Rham cohomology with compact support, or the compact cohomology. The concept of cohomology can ...

Analyzing Network Topology For Ddos Mitigation Using The Abelian Sandpile Model, 2020 Reed College

#### Analyzing Network Topology For Ddos Mitigation Using The Abelian Sandpile Model, Bhavana Panchumarthi, Monroe Ame Stephenson

*altREU Projects*

A Distributed Denial of Service (DDoS) is a cyber attack, which is capable of triggering a cascading failure in the victim network. While DDoS attacks come in different forms, their general goal is to make a network's service unavailable to its users. A common, but risky, countermeasure is to blackhole or null route the source, or the attacked destination. When a server becomes a blackhole, or referred to as the sink in the paper, the data that is assigned to it "disappears" or gets deleted. Our research shows how mathematical modeling can propose an alternative blackholing strategy that could ...

Harmony Amid Chaos, 2020 Olivet Nazarene University

#### Harmony Amid Chaos, Drew Schaffner

*Pence-Boyce STEM Student Scholarship*

We provide a brief but intuitive study on the subjects from which Galois Fields have emerged and split our study up into two categories: harmony and chaos. Specifically, we study finite fields with elements where is prime. Such a finite field can be defined through a logarithm table. The Harmony Section is where we provide three proofs about the overall symmetry and structure of the Galois Field as well as several observations about the order within a given table. In the Chaos Section we make two attempts to analyze the tables, the first by methods used by Vladimir Arnold as ...

A Differential-Algebraic Criterion For Obtaining A Small Maximal Cohen-Macaulay Module, 2020 CUNY New York City College of Technology

#### A Differential-Algebraic Criterion For Obtaining A Small Maximal Cohen-Macaulay Module, Hans Schoutens

*Publications and Research*

We show how for a three-dimensional complete local ring in positive characteristic, the existence of an F-invariant, differentiable derivation implies Hochster’s small MCM conjecture. As an application we show that any three-dimensional pseudo-graded ring in positive characteristic satisﬁes Hochster’s small MCM conjecture.

Multiparty Non-Interactive Key Exchange And More From Isogenies On Elliptic Curves, 2020 Stanford University

#### Multiparty Non-Interactive Key Exchange And More From Isogenies On Elliptic Curves, Dan Boneh, Darren B. Glass, Daniel Krashen, Kristin Lauter, Shahed Sharif, Alice Silverberg, Mehdi Tibouchi, Mark Zhandry

*Math Faculty Publications*

We describe a framework for constructing an efficient non-interactive key exchange (NIKE) protocol for *n* parties for any *n* ≥ 2. Our approach is based on the problem of computing isogenies between isogenous elliptic curves, which is believed to be difficult. We do not obtain a working protocol because of a missing step that is currently an open mathematical problem. What we need to complete our protocol is an efficient algorithm that takes as input an abelian variety presented as a product of isogenous elliptic curves, and outputs an isomorphism invariant of the abelian variety.

Our framework builds a *cryptographic invariant ...*

Hyperbolic Triangle Groups, 2020 California State University, San Bernardino

#### Hyperbolic Triangle Groups, Sergey Katykhin

*Electronic Theses, Projects, and Dissertations*

This paper will be on hyperbolic reflections and triangle groups. We will compare hyperbolic reflection groups to Euclidean reflection groups. The goal of this project is to give a clear exposition of the geometric, algebraic, and number theoretic properties of Euclidean and hyperbolic reflection groups.

Evolution Of Computational Thinking Contextualized In A Teacher-Student Collaborative Learning Environment., 2020 Louisiana State University and Agricultural and Mechanical College

#### Evolution Of Computational Thinking Contextualized In A Teacher-Student Collaborative Learning Environment., John Arthur Underwood

*LSU Doctoral Dissertations*

The discussion of Computational Thinking as a pedagogical concept is now essential as it has found itself integrated into the core science disciplines with its inclusion in all of the Next Generation Science Standards (NGSS, 2018). The need for a practical and functional definition for teacher practitioners is a driving point for many recent research endeavors. Across the United States school systems are currently seeking new methods for expanding their students’ ability to analytically think and to employee real-world problem-solving strategies (Hopson, Simms, and Knezek, 2001). The need for STEM trained individuals crosses both the vocational certified and college degreed ...

An Analysis And Comparison Of Knot Polynomials, 2020 James Madison University

#### An Analysis And Comparison Of Knot Polynomials, Hannah Steinhauer

*Senior Honors Projects, 2020-current*

Knot polynomials are polynomial equations that are assigned to knot projections based on the mathematical properties of the knots. They are also invariants, or properties of knots that do not change under ambient isotopy. In other words, given an invariant α for a knot K, α is the same for any projection of K. We will define these knot polynomials and explain the processes by which one finds them for a given knot projection. We will also compare the relative usefulness of these polynomials.

Hyperbolic Endomorphisms Of Free Groups, 2020 University of Arkansas, Fayetteville

#### Hyperbolic Endomorphisms Of Free Groups, Jean Pierre Mutanguha

*Theses and Dissertations*

We prove that ascending HNN extensions of free groups are word-hyperbolic if and only if they have no Baumslag-Solitar subgroups. This extends Brinkmann's theorem that free-by-cyclic groups are word-hyperbolic if and only if they have no Z2 subgroups. To get started on our main theorem, we first prove a structure theorem for injective but nonsurjective endomorphisms of free groups. With the decomposition of the free group given by this structure theorem, we (more or less) construct representatives for nonsurjective endomorphisms that are expanding immersions relative to a homotopy equivalence. This structure theorem initializes the development of (relative) train track ...

Fern Or Fractal... Or Both?, 2020 Concordia University St. Paul

#### Fern Or Fractal... Or Both?, Christina Babcock

*Research and Scholarship Symposium Posters*

Fractals are series of self similar sets and can be found in nature. After researching the Barnsley Fern and the iterated function systems using to create the fractal, I was able to apply what I learned to create a fractal shell. This was done using iterated function systems, matrices, random numbers, and Python coding.