Elimination For Systems Of Algebraic Differential Equations, 2017 The Graduate Center, City University of New York

#### Elimination For Systems Of Algebraic Differential Equations, Richard Gustavson

*All Graduate Works by Year: Dissertations, Theses, and Capstone Projects*

We develop new upper bounds for several effective differential elimination techniques for systems of algebraic ordinary and partial differential equations. Differential elimination, also known as decoupling, is the process of eliminating a fixed subset of unknown functions from a system of differential equations in order to obtain differential algebraic consequences of the original system that do not depend on that fixed subset of unknowns. A special case of differential elimination, which we study extensively, is the question of consistency, that is, if the given system of differential equations has a solution. We first look solely at the ``algebraic data" of ...

The Recognition Problem For Table Algebras And Reality-Based Algebras, 2017 University of Regina

#### The Recognition Problem For Table Algebras And Reality-Based Algebras, Allen Herman, Mikhail Muzychuk, Bangteng Xu

*EKU Faculty and Staff Scholarship*

Given a finite-dimensional noncommutative semisimple algebra A over C with involution, we show that A always has a basis B for which ( A , B ) is a reality-based algebra. For algebras that have a one-dimensional representation δ , we show that there always exists an RBA-basis for which δ is a positive degree map. We characterize all RBA-bases of the 5-dimensional noncommutative semisimple algebra for which the algebra has a positive degree map, and give examples of RBA-bases of C ⊕ M n ( C ) for which the RBA has a positive degree map, for all n ≥ 2

Projective Partitions Of Vector Spaces, 2017 Siena College

#### Projective Partitions Of Vector Spaces, Mohammad Javaheri

*Electronic Journal of Linear Algebra*

Given infinite-dimensional real vector spaces $V,W$ with $|W| \leq |V|$, it is shown that there exists a collection of subspaces of $V$ that are isomorphic to $W$, mutually intersect only at 0, and altogether cover $V$.

Singular Value And Norm Inequalities Associated With 2 X 2 Positive Semidefinite Block Matrices, 2017 Zarqa University

#### Singular Value And Norm Inequalities Associated With 2 X 2 Positive Semidefinite Block Matrices, Aliaa Burqan, Fuad Kittaneh

*Electronic Journal of Linear Algebra*

This paper aims to give singular value and norm inequalities associated with $2\times 2$ positive semidefinite block matrices.

A Financial Literacy Curriculum Project On Linear Functions In Algebra I Aligned With New York State Common Core State Standards, 2017 The College at Brockport

#### A Financial Literacy Curriculum Project On Linear Functions In Algebra I Aligned With New York State Common Core State Standards, Michael T. Hughson Jr

*Education and Human Development Master's Theses*

There is a lack of financial literacy curriculum available for teachers to support students learning of mathematical skills that are needed in real life. Financial literacy curricula can support students learning real life skills needed before independent living situations in college or career. Direct mathematical modelling and application can support students comprehension of the relationship between financial literacy and algebra. This curriculum highlights the ideology of *the need to know drives learning *and aligns real world financial literacy problems to the Common Core State Standards (CCSS) algebra standards.

Application Of Symplectic Integration On A Dynamical System, 2017 East Tennessee State University

#### Application Of Symplectic Integration On A Dynamical System, William Frazier

*Electronic Theses and Dissertations*

Molecular Dynamics (MD) is the numerical simulation of a large system of interacting molecules, and one of the key components of a MD simulation is the numerical estimation of the solutions to a system of nonlinear differential equations. Such systems are very sensitive to discretization and round-off error, and correspondingly, standard techniques such as Runge-Kutta methods can lead to poor results. However, MD systems are conservative, which means that we can use Hamiltonian mechanics and symplectic transformations (also known as canonical transformations) in analyzing and approximating solutions. This is standard in MD applications, leading to numerical techniques known as symplectic ...

Six Septembers: Mathematics For The Humanist, 2017 Duquesne University

#### Six Septembers: Mathematics For The Humanist, Patrick Juola, Stephen Ramsay

*Zea E-Books*

Scholars of all stripes are turning their attention to materials that represent enormous opportunities for the future of humanistic inquiry. The purpose of this book is to impart the concepts that underlie the mathematics they are likely to encounter and to unfold the notation in a way that removes that particular barrier completely. This book is a primer for developing the skills to enable humanist scholars to address complicated technical material with confidence. This book, to put it plainly, is concerned with the things that the author of a technical article knows, but isn’t saying. Like any field, mathematics ...

A Game Of Monovariants On A Checkerboard, 2017 Lynchburg College

#### A Game Of Monovariants On A Checkerboard, Linwood Reynolds

*Student Scholar Showcase*

Abstract: Assume there is a game that takes place on a 20x20 checkerboard in which each of the 400 squares are filled with either a penny, nickel, dime, or quarter. The coins are placed randomly onto the squares, and there are to be 100 of each of the coins on the board. To begin the game, 59 coins are removed at random. The goal of the game is to remove each remaining coin from the board according to the following rules: 1. A penny can only be removed if all 4 adjacent squares are empty. That is, a penny cannot ...

The Enhanced Principal Rank Characteristic Sequence For Hermitian Matrices, 2017 Iowa State University

#### The Enhanced Principal Rank Characteristic Sequence For Hermitian Matrices, Steve Butler, M. Catral, H. Tracy Hall, Leslie Hogben, Xavier Martinez-Rivera, Bryan L. Shader, Pauline Van Den Driessche

*Electronic Journal of Linear Algebra*

The enhanced principal rank characteristic sequence (epr-sequence) of an $n\x n$ matrix is a sequence $\ell_1 \ell_2 \cdots \ell_n$, where each $\ell_k$ is ${\tt A}$, ${\tt S}$, or ${\tt N}$ according as all, some, or none of its principal minors of order $k$ are nonzero. There has been substantial work on epr-sequences of symmetric matrices (especially real symmetric matrices) and real skew-symmetric matrices, and incidental remarks have been made about results extending (or not extending) to (complex) Hermitian matrices. A systematic study of epr-sequences of Hermitian matrices is undertaken; the differences with the case of symmetric matrices are quite ...

Self-Interlacing Polynomials Ii: Matrices With Self-Interlacing Spectrum, 2017 Shanghai Jiaotong University

#### Self-Interlacing Polynomials Ii: Matrices With Self-Interlacing Spectrum, Mikhail Tyaglov

*Electronic Journal of Linear Algebra*

An $n\times n$ matrix is said to have a self-interlacing spectrum if its eigenvalues $\lambda_k$, $k=1,\ldots,n$, are distributed as follows: $$ \lambda_1>-\lambda_2>\lambda_3>\cdots>(-1)^{n-1}\lambda_n>0. $$ A method for constructing sign definite matrices with self-interlacing spectrum from totally nonnegative ones is presented. This method is applied to bidiagonal and tridiagonal matrices. In particular, a result by O. Holtz on the spectrum of real symmetric anti-bidiagonal matrices with positive nonzero entries is generalized.

Session A-3: Three-Act Math Tasks, 2017 Illinois Mathematics and Science Academy

#### Session A-3: Three-Act Math Tasks, Lindsey Herlehy

*Professional Learning Day*

Participants will engage in a Three-Act Math task highlighting the application of properties of geometrical figures. Developed by Dan Meyer, an innovative and highly regarded mathematics instructor, Three-Act Math tasks utilize pedagogical skills that elicit student curiosity, collaboration and questioning. By posing a mathematical problem through active storytelling, this instructional approach redefines real-world mathematics and clarifies the role that a student plays in the learning process. Participants will be given multiple resources where they can access Three-Act Math tasks appropriate for upper elementary grades through Algebra and Geometry courses.

Generalized Left And Right Weyl Spectra Of Upper Triangular Operator Matrices, 2017 University of Nis

#### Generalized Left And Right Weyl Spectra Of Upper Triangular Operator Matrices, Guojun Hai, Dragana S. Cvetkovic-Ilic

*Electronic Journal of Linear Algebra*

In this paper, for given operators $A\in\B(\H)$ and $B\in\B(\K)$, the sets of all $C\in \B(\K,\H)$ such that $M_C=\bmatrix{cc} A&C\\0&B\endbmatrix$ is generalized Weyl and generalized left (right) Weyl, are completely described. Furthermore, the following intersections and unions of the generalized left Weyl spectra $$ \bigcup_{C\in\B(\K,\H)}\sigma^g_{lw}(M_C) \;\;\; \mbox{and} \;\;\; \bigcap_{C\in\B(\K,\H)}\sigma^g_{lw}(M_C) $$ are also described, and necessary and sufficient conditions which two operators $A\in\B(\H)$ and $B\in\B(\K)$ have to satisfy in order for $M_C$ to be a generalized left Weyl operator for each $C\in\B(\K,\H)$, are presented.

The Mathematics Of Superoscillations, 2017 Chapman University

#### The Mathematics Of Superoscillations, Yakir Aharonov, Fabrizio Colombo, Irene Sabadini, Daniele C. Struppa, Jeff Tollaksen

*Mathematics, Physics, and Computer Science Faculty Articles and Research*

In the past 50 years, quantum physicists have discovered, and experimentally demonstrated, a phenomenon which they termed superoscillations. Aharonov and his collaborators showed that superoscillations naturally arise when dealing with weak values, a notion that provides a fundamentally different way to regard measurements in quantum physics. From a mathematical point of view, superoscillating functions are a superposition of small Fourier components with a bounded Fourier spectrum, which result, when appropriately summed, in a shift that can be arbitrarily large, and well outside the spectrum. Purpose of this work is twofold: on one hand we provide a self-contained survey of the ...

Lorentz Transformation From An Elementary Point Of View, 2017 Laboratoire de Physique Th\'{e}orique, Universit\'{e} de Toulouse III \& CNRS

#### Lorentz Transformation From An Elementary Point Of View, Arkadiusz Jadczyk, Jerzy Szulga

*Electronic Journal of Linear Algebra*

Elementary methods are used to examine some nontrivial mathematical issues underpinning the Lorentz transformation. Its eigen-system is characterized through the exponential of a $G$-skew symmetric matrix, underlining its unconnectedness at one of its extremes (the hyper-singular case). A different yet equivalent angle is presented through Pauli coding which reveals the connection between the hyper-singular case and the shear map.

Links With Finite N-Quandles, 2017 Pitzer College

#### Links With Finite N-Quandles, Jim Hoste, Patrick D. Shanahan

*Patrick Shanahan*

We prove a conjecture of Przytycki which asserts that the *n*-quandle of a link *L* in the 3-sphere is finite if and only if the fundamental group of the *n*-fold cyclic branched cover of the 3-sphere, branched over *L*, is finite.

Specifications Grading In A First Course In Abstract Algebra, 2017 Dordt College

#### Specifications Grading In A First Course In Abstract Algebra, Mike Janssen

*Faculty Work: Comprehensive List*

Specifications grading offers an alternative to more traditional, points-based grading and assessment structures. In place of partial credit, students are assessed pass/fail on whether or not they have achieved the learning outcomes being assessed on a given piece of work according to certain specifications, with limited opportunities for revision of non-passing work. This talk will describe the learning outcomes and specifications grading system I used in my Fall 2016 abstract algebra course, as well as student responses.

Normal Subgroups Of Wreath Product 3-Groups, 2017 The University of Akron

#### Normal Subgroups Of Wreath Product 3-Groups, Ryan Gopp

*Honors Research Projects*

Consider the regular wreath product group P of Z_{9} with (Z_{3} x Z_{3}). The problem of determining all normal subgroups of P that are contained in its base subgroup is equivalent to determining the subgroups of a certain matrix group M that are invariant under two particular endomorphisms of M. This thesis is a partial solution to the latter. We use concepts from linear algebra and group theory to find and count so-called doubly-invariant subgroups of M.

Colorings Of Hamming-Distance Graphs, 2017 University of Kentucky

#### Colorings Of Hamming-Distance Graphs, Isaiah H. Harney

*Theses and Dissertations--Mathematics*

Hamming-distance graphs arise naturally in the study of error-correcting codes and have been utilized by several authors to provide new proofs for (and in some cases improve) known bounds on the size of block codes. We study various standard graph properties of the Hamming-distance graphs with special emphasis placed on the chromatic number. A notion of robustness is defined for colorings of these graphs based on the tolerance of swapping colors along an edge without destroying the properness of the coloring, and a complete characterization of the maximally robust colorings is given for certain parameters. Additionally, explorations are made into ...

Zero Forcing Propagation Time On Oriented Graphs, 2017 Saint Olaf College

#### Zero Forcing Propagation Time On Oriented Graphs, Adam Berliner, Chassidy Bozeman, Steve Butler, Minerva Catral, Leslie Hogben, Brenda Kroschel, Jephian C.H. Lin, Nathan Warnberg, Michael Young

*Mathematics Publications*

Zero forcing is an iterative coloring procedure on a graph that starts by initially coloring vertices white and blue and then repeatedly applies the following rule: if any blue vertex has a unique (out-)neighbor that is colored white, then that neighbor is forced to change color from white to blue. An initial set of blue vertices that can force the entire graph to blue is called a zero forcing set. In this paper we consider the minimum number of iterations needed for this color change rule to color all of the vertices blue, also known as the propagation time ...

On A Class Of Quaternionic Positive Definite Functions And Their Derivatives, 2017 Chapman University

#### On A Class Of Quaternionic Positive Definite Functions And Their Derivatives, Daniel Alpay, Fabrizio Colombo, Irene Sabadini

*Mathematics, Physics, and Computer Science Faculty Articles and Research*

In this paper, we start the study of stochastic processes over the skew field of quaternions. We discuss the relation between positive definite functions and the covariance of centered Gaussian processes and the construction of stochastic processes and their derivatives. The use of perfect spaces and strong algebras and the notion of Fock space are crucial in this framework.