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Lorentzian Lattices And E-Polytopes, Adrian Clingher, Jae-Hyouk Lee Sep 2018

Lorentzian Lattices And E-Polytopes, Adrian Clingher, Jae-Hyouk Lee

Adrian Clingher

We consider certain En-type root lattices embedded within the standard Lorentzian lattice Z n+1 (3 ≤ n ≤ 8) and study their discrete geometry from the point of view of del Pezzo surface geometry. The lattice Z n+1 decomposes as a disjoint union of affine hyperplanes which satisfy a certain periodicity. We introduce the notions of line vectors, rational conic vectors, and rational cubics vectors and their relations to E-polytopes. We also discuss the relation between these special vectors and the combinatorics of the Gosset polytopes of type (n − 4)21.


Weighted Composition Operators On Spaces Of Analytic Functions: A Survey, Soumyadip Acharyya Sep 2018

Weighted Composition Operators On Spaces Of Analytic Functions: A Survey, Soumyadip Acharyya

Soumyadip Acharyya

“Pure mathematics is, in its way, the poetry of logical ideas.” - Albert Einstein. Pure mathematicians study abstract entities and structures that underlie mathematics. Although their general perspective is “math for math’s sake”, sometimes even the most abstract mathematics can have unexpected applications! Come learn some of these astonishing discoveries in the history of science and mathematics! They might make you thrilled but keep in mind real-world usage is rarely the goal behind developing a new mathematical theory.

Welcome to the world of pure mathematics! In this talk, we will focus on the theory of composition operators which is a …


A Math Research Project Inspired By Twin Motherhood, Tiffany N. Kolba Aug 2018

A Math Research Project Inspired By Twin Motherhood, Tiffany N. Kolba

Tiffany N Kolba

The phenomenon of twins, triplets, quadruplets, and other higher order multiples has fascinated humans for centuries and has even captured the attention of mathematicians who have sought to model the probabilities of multiple births. However, there has not been extensive research into the phenomenon of polyovulation, which is one of the biological mechanisms that produces multiple births. In this paper, I describe how my own experience becoming a mother to twins led me on a quest to better understand the scientific processes going on inside my own body and motivated me to conduct research on polyovulation frequencies. An overview of …


Excess Versions Of The Minkowski And Hölder Inequalities, Iosif Pinelis Jul 2018

Excess Versions Of The Minkowski And Hölder Inequalities, Iosif Pinelis

Iosif Pinelis

No abstract provided.


Using Three Fields Of Education Research To Frame The Development Of Digital Games, Michelle Zandieh, David Plaxco, Caro Williams-Peirce, Ashish Amresh Jun 2018

Using Three Fields Of Education Research To Frame The Development Of Digital Games, Michelle Zandieh, David Plaxco, Caro Williams-Peirce, Ashish Amresh

Ashish Amresh

No abstract provided.


Rainbow Matchings And Hamilton Cycles In Random Graphs, Deepak Bal, Alan Frieze May 2018

Rainbow Matchings And Hamilton Cycles In Random Graphs, Deepak Bal, Alan Frieze

Deepak Bal

Let HPn,m,k be drawn uniformly from all m-edge, k-uniform, k-partite hypergraphs where each part of the partition is a disjoint copy of [n]. We let HP(κ) n,m,k be an edge colored version, where we color each edge randomly from one of κ colors. We show that if κ = n and m = Kn log n where K is sufficiently large then w.h.p. there is a rainbow colored perfect matching. I.e. a perfect matching in which every edge has a different color. We also show that if n is even and m = Kn log n where K is sufficiently …


The T-Tone Chromatic Number Of Random Graphs, Deepak Bal, Patrick Bennett, Andrzej Dudek, Alan Frieze May 2018

The T-Tone Chromatic Number Of Random Graphs, Deepak Bal, Patrick Bennett, Andrzej Dudek, Alan Frieze

Deepak Bal

A proper 2-tone k-coloring of a graph is a labeling of the vertices with elements from ([k]2) such that adjacent vertices receive disjoint labels and vertices distance 2 apart receive distinct labels. The 2-tone chromatic number of a graph G, denoted τ 2(G) is the smallest k such thatG admits a proper 2-tone k coloring. In this paper, we prove that w.h.p. for p≥Cn−1/4ln9/4n,τ2(Gn,p)=(2+o(1))χ(Gn,p) where χ represents the ordinary chromatic number. For sparse random graphs with p = c/n, c constant, we prove that τ2(Gn,p)=⌈(8Δ+1−−−−−−√+5)/2 where Δ represents the maximum degree. For …


A Greedy Algorithm For Finding A Large 2-Matching On A Random Cubic Graph, Deepak Bal, Patrick Bennett, Tom Bohman, Alan Frieze May 2018

A Greedy Algorithm For Finding A Large 2-Matching On A Random Cubic Graph, Deepak Bal, Patrick Bennett, Tom Bohman, Alan Frieze

Deepak Bal

A 2-matching of a graph G is a spanning subgraph with maximum degree two. The size of a 2-matching U is the number of edges in U and this is at least $n-\k(U)$ where n is the number of vertices of G and $\k$ denotes the number of components. In this paper, we analyze the performance of a greedy algorithm \textsc{2greedy} for finding a large 2-matching on a random 3-regular graph. We prove that with high probability, the algorithm outputs a 2-matching U with$\k(U) = \tilde{\Theta}\of{n^{1/5}}$.


Power Of K Choices And Rainbow Spanning Trees In Random Graphs, Deepak Bal, Patrick Bennett, Alan Frieze, Pawel Pralat May 2018

Power Of K Choices And Rainbow Spanning Trees In Random Graphs, Deepak Bal, Patrick Bennett, Alan Frieze, Pawel Pralat

Deepak Bal

We consider the Erdős-Rényi random graph process, which is a stochastic process that starts with nvertices and no edges, and at each step adds one new edge chosen uniformly at random from the set of missing edges. Let G(n,m) be a graph with m edges obtained after m steps of this process. Each edge ei (i=1,2,…,m) of G(n,m) independently chooses precisely k∈N colours, uniformly at random, from a given set of n−1 colours (one may view ei as a multi-edge). We stop the process prematurely at time M when the following two events hold: G(n,M) is connected and every colour …


Packing Tree Factors In Random And Pseudo-Random Graphs, Deepak Bal, Alan Frieze, Michael Krivelevich, Po-Shen Loh May 2018

Packing Tree Factors In Random And Pseudo-Random Graphs, Deepak Bal, Alan Frieze, Michael Krivelevich, Po-Shen Loh

Deepak Bal

For a fixed graph H with t vertices, an H-factor of a graph G with n vertices, where t divides n, is a collection of vertex disjoint (not necessarily induced) copies of H in G covering all vertices of G. We prove that for a fixed tree T on t vertices and ϵ>0, the random graph Gn,p, with n a multiple of t, with high probability contains a family of edge-disjoint T-factors covering all but an ϵ-fraction of its edges, as long as ϵ4np≫log2n. Assuming stronger divisibility conditions, the edge probability can be taken down to p>Clognn. A …


Rainbow Arborescence In Random Digraphs, Deepak Bal, Patrick Bennett, Colin Cooper, Alan Frieze, Pawel Pralat May 2018

Rainbow Arborescence In Random Digraphs, Deepak Bal, Patrick Bennett, Colin Cooper, Alan Frieze, Pawel Pralat

Deepak Bal

We consider the Erd˝os-R´enyi random directed graph process, which is a stochastic process that starts with n vertices and no edges, and at each step adds one new directed edge chosen uniformly at random from the set of missing edges. Let D(n, m) be a graph with m edges obtained after m steps of this process. Each edge ei (i = 1, 2, . . . , m) of D(n, m) independently chooses a colour, taken uniformly at random from a given set of n(1 + O(log log n/ log n)) = n(1 + o(1)) colours. We stop the process …


Packing Tight Hamilton Cycles In Uniform Hypergraphs, Deepak Bal, Alan Frieze May 2018

Packing Tight Hamilton Cycles In Uniform Hypergraphs, Deepak Bal, Alan Frieze

Deepak Bal

We say that a k-uniform hypergraph C is a Hamilton cycle of type ℓ, for some 1 ≤ ℓ ≤ k, if there exists a cyclic ordering of the vertices of C such that every edge consists of k consecutive vertices and for every pair of consecutive edges Ei−1, Ei in C (in the natural ordering of the edges) we have |Ei−1 \ Ei | = ℓ. We define a class of (ε, p)-regular hypergraphs, that includes random hypergraphs, for which we can prove the existence of a decomposition of almost all edges into type ℓ Hamilton cycles, where ℓ < k/2.


Homogenization In Perforated Domains And With Soft Inclusions, Brandon C. Russell Apr 2018

Homogenization In Perforated Domains And With Soft Inclusions, Brandon C. Russell

Brandon Russell

In this dissertation, we first provide a short introduction to qualitative homogenization of elliptic equations and systems. We collect relevant and known results regarding elliptic equations and systems with rapidly oscillating, periodic coefficients, which is the classical setting in homogenization of elliptic equations and systems. We extend several classical results to the so-called case of perforated domains and consider materials reinforced with soft inclusions. We establish quantitative H^1-convergence rates in both settings, and as a result deduce large-scale Lipschitz estimates and Liouville-type estimates for solutions to elliptic systems with rapidly oscillating, periodic, bounded, and measurable coefficients. Finally, we connect these …


Notes On The Proof Of The Van Der Waerden Permanent Conjecture, Vicente Valle Martinez Apr 2018

Notes On The Proof Of The Van Der Waerden Permanent Conjecture, Vicente Valle Martinez

Vicente Valle Martinez

The permanent of an $n\times n$ matrix $A=(a_{i j})$ with real entries is defined by the sum
$$\sum_{\sigma \in S_n} \prod_{i=1}^{n} a_{i \sigma(i)}$$
where $S_n$ denotes the symmetric group on the $n$-element set $\{1,2,\dots,n\}$.
In this creative component we survey some known properties of permanents, calculation of permanents for particular types of matrices and their applications in combinatorics and linear algebra. Then we follow the lines of van Lint's exposition of Egorychev's proof for the van der Waerden's conjecture on the permanents of doubly stochastic matrices. The purpose of this component is to provide elementary proofs of several interesting known …


The Subject Librarian Newsletter, Mathematics, Fall 2016, Sandy Avila Apr 2018

The Subject Librarian Newsletter, Mathematics, Fall 2016, Sandy Avila

Sandy Avila

No abstract provided.


The Subject Librarian Newsletter, Mathematics, Spring 2017, Sandy Avila Apr 2018

The Subject Librarian Newsletter, Mathematics, Spring 2017, Sandy Avila

Sandy Avila

No abstract provided.


Theory Of Relativity: Interview With Dr. Jonathan Lovell, Orlando Mcallister Apr 2018

Theory Of Relativity: Interview With Dr. Jonathan Lovell, Orlando Mcallister

Orlando McAllister

No abstract provided.


Global Stability For A 2n+1 Dimensional Hiv Aids Epidemic Model With Treatments, Olusegun M. Otunuga Mar 2018

Global Stability For A 2n+1 Dimensional Hiv Aids Epidemic Model With Treatments, Olusegun M. Otunuga

Olusegun Michael Otunuga

In this work, we derive and analyze a 2n+1-dimensional deterministic differential equation modeling the transmission and treatment of HIV (Human Immunodeficiency Virus) disease. The model is extended to a stochastic differential equation by introducing noise in the transmission rate of the disease. A theoretical treatment strategy of regular HIV testing and immediate treatment with Antiretroviral Therapy (ART) is investigated in the presence and absence of noise. By defining $R_{0,n}$, $R_{t,n}$ and $\mathcal{R}_{t,n}$ as the deterministic basic reproduction number in the absence of ART treatments, deterministic basic reproduction number in the presence of ART treatments and stochastic reproduction number …


Drawing On Three Fields Of Education Research To Frame The Development Of Digital Games For Inquiry-Oriented Linear Algebra, Michelle Zandieh, David Plaxco, Caro Williams-Peirce, Ashish Amresh Feb 2018

Drawing On Three Fields Of Education Research To Frame The Development Of Digital Games For Inquiry-Oriented Linear Algebra, Michelle Zandieh, David Plaxco, Caro Williams-Peirce, Ashish Amresh

Ashish Amresh

No abstract provided.


Gphcessay.Docx, Daryl Bagley Feb 2018

Gphcessay.Docx, Daryl Bagley

Daryl Bagley

No abstract provided.


Gphcessay.Docx, Daryl Bagley Feb 2018

Gphcessay.Docx, Daryl Bagley

Daryl Bagley

No abstract provided.


Gphcessay.Docx, Daryl Bagley Feb 2018

Gphcessay.Docx, Daryl Bagley

Daryl Bagley

No abstract provided.


Gphcessay.Docx, Daryl Bagley Feb 2018

Gphcessay.Docx, Daryl Bagley

Daryl Bagley

No abstract provided.


Gphcessay.Docx, Daryl Bagley Feb 2018

Gphcessay.Docx, Daryl Bagley

Daryl Bagley

No abstract provided.


Gphcessay.Docx, Daryl Bagley Feb 2018

Gphcessay.Docx, Daryl Bagley

Daryl Bagley

No abstract provided.


Gphcessay.Docx, Daryl Bagley Feb 2018

Gphcessay.Docx, Daryl Bagley

Daryl Bagley

No abstract provided.


Gphcessay.Docx, Daryl Bagley Feb 2018

Gphcessay.Docx, Daryl Bagley

Daryl Bagley

No abstract provided.


Gphcessay.Docx, Daryl Bagley Feb 2018

Gphcessay.Docx, Daryl Bagley

Daryl Bagley

No abstract provided.


Gphcessay.Docx, Daryl Bagley Feb 2018

Gphcessay.Docx, Daryl Bagley

Daryl Bagley

No abstract provided.


Gphcessay.Docx, Daryl Bagley Feb 2018

Gphcessay.Docx, Daryl Bagley

Daryl Bagley

No abstract provided.