Meet the Staff
All of the math department staff relevant for graduate students will be here to tell you what they do and answer your pressing questions.
Events
20 events found.
Pedro Aceves Sanchez, NC State, Emergence of Vascular Networks
he emergence of vascular networks is a long-standing problem which has been the subject of intense research in the past decades. One of the main reasons being the widespread applications that it has in tissue regeneration, wound…
Tea and Cookies
SAS 4104Nathan Reading, NC State, Regular Polytopes and Tessellations: Why life is more interesting in low dimension
SAS 2102Polytopes (also known in dimensions zero through three as "points", "line segments", “polygons", and “polyhedra") have been objects of interest to mathematicians throughout the recorded history of mathematics. Most notably,…
Christian Smith, NC State, The Algebra of “up-operators” for Young’s Lattice and Bruhat Order on S_n
Let be a free associative algebra over generated by for in some indexing set and let be a poset. For and we define an action of on (the complex vector space with basis ) in a way such that either annihilates or…
Emily Gunawan, University of Connecticut, Cambrian combinatorics on quiver representations
Let Q be an orientation of a type A Dynkin diagram. An eta map corresponding to Q is a surjection from the weak order on permutations to a Cambrian lattice…
Donald Sheehy, NC State, On the Cohomology of Impossible Figures, Revisited
The Penrose triangle, also known as the impossible tribar is an icon for cohomology. It is literally the icon for Cech cohomology on Wikipedia. The idea goes back to a…
Jon Stallrich, NC State, Sign-Informative Design and Analysis of Supersaturated Designs
Much of the literature on the design and analysis of supersaturated designs (SSDs), in which the number of factors exceeds the number of runs, rests on design principles assuming a least-squares analysis. More…
AWM Brown Bag Lunch
SAS 4104Tea and Cookies
SAS 4104John Lagergren, SIAM Student Chapter: Graduate Student Tutorial
Mann 404Machine learning has become widely popular in fields like computer vision, natural language processing, and speech recognition, often performing tasks better than humans. A fundamental building block of many of…
130th Math Department Anniversary Celebration
Register now for a weekend anniversary celebration marking 130 years of mathematics education and research here at NC State. The history of mathematics at the university dates to 1889, when…
NC State Mathematics 130th anniversary picnic
Pullen Park, Shelter #4 RaleighYan Zhuang, Davidson College, Counting permutations by peaks, descents, and cycle type
We present a general formula describing the joint distribution of two permutation statistics—the peak number and the descent number—over any set of permutations whose quasisymmetric generating function is a symmetric…
JungHwan Park, Georgia Tech, Rational cobordisms and integral homology
We prove that every rational homology cobordism class in the subgroup generated by lens spaces is represented by a unique connected sum of lens spaces whose first homology embeds in…
Eric Hallman, NC State, Sharp 2-norm Error Bounds for LSQR and the Conjugate Gradient Method
When running any iterative algorithm it is useful to know when to stop. Here we review LSQR and LSLQ, two iterative methods for solving \min_x \|Ax-b\|_2 based on the Golub-Kahan…
Tea and Cookies
SAS 4104Differential Equations and Nonlinear Analysis Seminar: Mikhail Klibanov, UNC Charlotte, Carleman Estimates for Globally Convergent Numerical Methods for Coefficient Inverse Problems
The ill-posedness and nonlinearity are two factors causing the phenomenon of multiple local minima and ravines of conventional least squares cost functionals for Coefficient Inverse Problems. Since any minimization method…