This page contains a list of Mathematics and Computer Science seminars for the current semester. Links to previous semesters can be found at the bottom of the page.

DATE	SPEAKER	TITLE
Thu Jan. 19	Jim Riles	"Finitely presented soluble groups"
Abstract: Jim Riles will lead our continuing workshop "Finitely presented soluble groups," following an exposition by R. Strebel, which highlights a theory of geometric invariants that determine the structure of finitely generated groups in certain varieties. This talk will be largely self-contained, independent of prior talks in this series.
Thu Jan 26	Jim Riles	Workshop: "Finitely presented soluble groups"
Thu Feb 2	Jim Riles	Workshop: "Finitely presented soluble groups"
Thu Feb 9	Jim Riles	Workshop: "Finitely presented soluble groups"
Thu Feb 16	Jim Riles	Workshop: "Finitely presented soluble groups"
Thu Feb 23	Jim Riles	Workshop: "Finitely presented soluble groups"
Thu Mar 2	Jim Riles	Workshop: "Finitely presented soluble groups"
Thu Mar 9	Jim Riles	Workshop: "Finitely presented soluble groups"
Thu Mar 23	Jim Riles	Workshop: "Finitely presented soluble groups"
Thu Mar 30	Jim Riles	Workshop: "Finitely presented soluble groups"
Thu Apr 6	Jim Riles	Workshop: "Finitely presented soluble groups"
Thu Apr 20	Jim Riles	Workshop: "Finitely presented soluble groups"
Thu Apr 27	Scott Annin, California State University, Fullerton	"Crash Course on Associated Primes in Noncommutative Ring Theory"
Abstract: Associated prime ideals have long played a central role in commutative ring theory with applications to algebraic geometry, localization theory, and elsewhere. More recently, a noncommutative theory of associated prime ideals has been developed. A great many interesting results, particularly for skew polynomial rings, have arisen from this work. In this talk, I will describe this theory, present several examples, and, if time permits, also discuss the dual concept of attached prime ideals. This talk takes place at a special time: 4:10 p.m. to 5:00 p.m., in 222 Ritter Hall.
Tue May 2	Nikolay Romanovskiy, the Institute of Mathematics, Novosibirsk, Russia	"On algebraic geometry over soluble groups"
Abstract: We describe algebraic sets in the free metabelian group and in the wreath product of two free abelian groups. We prove that free soluble groups are equationally noetherian. This talk takes place at a special time: 4:10 p.m. to 5:00 p.m., in 222 Ritter Hall.
Thu

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Analysis Seminar
Wednesdays, 3:10 - 4:00 in Ritter Hall 202

DATE	SPEAKER	TITLE
Fri Feb 17	Eric Weber Iowa State Universtity	Frames, Fourier Transforms, and Cryptography
Abstract: We will discuss two cryptographic algorithms, one proposed by us, and another proposed by others. The two algorithms are quite similar, using the redundancy of frames. We show, however, that they do not work, based on standard assumptions made in the cryptographic community. This is joint work with several undergraduate students during REU programs. Special time and place: 3:30PM Friday, February 17th; Ritter Hall 320
Wed. Mar 1	Darrin Speegle	Workshop on "Harmonic Analysis in Phase Space"
Wed. Mar 8	Brad Currey	"The Wigner Transform for Nilpotent Lie Groups"
Wed. Mar 22	Brad Currey	"The Wigner Transform for Nilpotent Lie Groups"
Wed. Mar 29	Brad Currey	"The Wigner Transform for Nilpotent Lie Groups"
Wed. April 12	Brad Currey	"The Wigner Transform for Nilpotent Lie Groups"
Wed. April 19	Tom McNamara	"Various models for irreducible unitary representations of F(3)".
Wed. April 26	Tom McNamara	"Various models for irreducible unitary representations of F(3)".

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Computer Science Seminar
Mondays, 3:00 - 3:50 in Ritter Hall 202

DATE	SPEAKER	TITLE
Fri Apr. 28	Dr.James Keller Mizzou	"Gene Ontology-based Similarity Measures for Gene Clustering and Knowledge Discovery"
This talk will be given 11:00 - 11:50 in RH 316
Fri Apr. 28	Dr. James Keller Mizzou	"Beyond 2001: The Linguistic Spatial Odyssey"
Dr Keller is the keynote speaker for our yearly awards ceremony. The talk is about computer vision, spatial navigation, and human-robot communication. There will be refreshments starting at 4:00 pm, and the ceremony should be over around 5:45. Place: Kelley Auditorium

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Topology- Geometry Seminar
Tuesdays, 3:10 - 4:00 in Ritter Hall 222

DATE	SPEAKER	TITLE
Fri Jan 20	Boris Apanosov	"Quasiconformal conjugation and stability of deformations of negatively curved spaces"
Special Time: 11:00 - 11:50 a.m. RH 316
Tue Feb 7	Anneke Bart	Refelectivity of Bianchi Groups
Abstract: A Bianchi Group is reflective if the group (after adjoining complex conjugation) can be generated by reflections. Definitions will be given and a general overview of known facts will be given. This talk is meant to provide the background for the next two talks which will highlight results of recent work by Letscher, Scannel and myself.
Tue Feb 14	Kevin Scannell	Refelectivity of Bianchi Groups II
Abstract: The Bianchi group PSL2(O-21) can be shown to be non-reflective, contrary to what appears in the literature. A theoretical proof will be outlined.
Tue Feb 21	David Letscher	Refelectivity of Bianchi Groups III
Abstract: Other open cases among the Bianchi groups have been dealt with using computers.
Tue Feb 28	Rob Anderson	Geometric Properties of Equipotential Surfaces
Tue Mar 7	Rob Anderson	Geometric Properties of Equipotential Surfaces II
Tue Mar 21	Jim Hebda	On the Level Surfaces of Potentials of Masses with Fixed Center of Gravity after John W. Green
Abstract: This paper adresses the problem of exactly how may level surfaces of an admissible potential can depart from being spherical, and what distributions give the extreme level surfaces.
Tue April 18	Ray Freese	Intrinsic Four-point Properties in Metric Spaces
Abstract: Many characterizations of euclidean spaces (real inner product spaces) among metric spaces have been based on euclidean four point embeddability properties. Related “intrinsic” four point properties have also been used to characterize euclidean or hyperbolic spaces among a suitable class of metric spaces. This talk will discuss a new paper that provides a characterization of euclidean or hyperbolic spaces based on intrinsic four point properties which are related to known four point embedding properties.
Tue May 2	Larry Granda	Homeomorphisms and disjoint curves on a surface
Abstract: We show that a matrix A in SL(2g, Z) is induced by an orientation preserving homeomorphism phi:Fg --> Fg of a closed orientable surface of genus g if and only if A preserves the intersection product. We then give conditions for when a collection of homology classes in H1(Fg) may be represented by a collection of pairwise disjoint simple closed curves on Fg.

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Math & CS Club
Wednesdays, 4:10 - 5:00 in Ritter Hall 316

DATE	SPEAKER	TITLE
Wed. Feb 8	Darren Pais	The Surface of Mars
Abstract: This talk includes 3-dimensional videos of the Martian surface and 3- dimensional models of surface elements in Mathlab, as well as illustrations of least-squares optimized plane and polynomial fits. Come to learn more about the planet Mars, unique surface features and ways to use mathematical tools to understand and interpret these features. Great pictures, video and some math promised!
Wed. Mar 1	Dr. Anne McNamara	Investigating Realism in Computer Graphics
Abstract: Computer Graphics research at the Department of Mathematics and Computer Science at SLU focuses on the advancement of Computer Graphics through novel approaches for creating, viewing and interacting with virtual spaces, while minimizing computational effort. In this talk I will an overview of the field of computer graphics, state of the art applications and talk about some of my projects and the equipment used in research, including a 3D Scanner used to acquire accurate 3D models of artifacts and objects.

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