Although the network clustering literature has focused on undirected networks, many networks are directed. For example, communication networks contain asymmetric relationships, representing the flow of information from one person to another. This talk will (1) demonstrate that co-clustering, instead of clustering, is more natural for many direct...
Creator:
Rohe, Karl (University of Wisconsin, Madison)
Created:
2012-03-29
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
I will present two different half-talks. In the first section, I will focus on the ideas behind replica exchange molecular dynamics, with an emphasis on improving efficiency by optimizing the time between attempted exchanges in Monte Carlo. In the second half, I will present a peculiarity of Langevin thermostats, which could cause substantially ...
Creator:
Roitberg, Adrian E. (University of Florida)
Created:
2009-01-15
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
In this interview, Ellen Roitenberg (1938 - ) discusses her Jewish family and their background on the North Side of Minneapolis. She discusses how difficult it was to get jobs, even as a trained professional, if you were Jewish. She talks of her father being a physician and the impact of the founding of Mount Sinai Hospital in Minneapolis. The d...
Creator:
Roitenberg, Ellen, (1938 - )
Contributor:
Norman, Jeff (Interviewer)
Created:
2012-06-12
Contributed By:
University of Minnesota Libraries, Nathan and Theresa Berman Upper Midwest Jewish Archives.
In this interview, Paul Roitenberg (1931 - ) gives his personal and family background, including information about a family grocery business. He gives reasons for why he moved from the North Side, along with some of his family members.
Creator:
Roitenberg, Paul, (1931 - )
Contributor:
Norman, Jeff (Interviewer)
Created:
2012-06-12
Contributed By:
University of Minnesota Libraries, Nathan and Theresa Berman Upper Midwest Jewish Archives.
Just as the number of real roots of a real univariate quadratic depends on the sign of the discriminant, the topological behavior of real zero sets depends on (more general) A-discriminant variety complements. More recently, in numerical linear algebra (and nonlinear work of Shub, Smale, Beltran, Pardo, and other authors), the relationship betwe...
Creator:
Rojas, J. Maurice (Texas A & M University)
Created:
2007-04-20
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
One of the most basic notions in polynomial systemsolvingis feasibility: does your system of equations have any roots?We willexplore the algorithmic complexity of this problem, focussingonsparse polynomial systems over the real numbers and complexnumbers. Over the complex numbers, we will see algorithmscompletelydifferent from homotopy, resultan...
Creator:
Rojas, J. Maurice (Texas A & M University)
Created:
2006-09-20
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
Katharyn shares her experiences of life during this time of COVID-19. She and her husband Michael, who contributed to this interview, traveled for three weeks starting in mid-May. They share the experiences and the challenges they had while on a cross-country road trip during the still early days of COVID-19. They drove through many states to vi...
Creator:
Rolfe, Katharyn; Rolfe, Michael
Contributor:
Moxley, Brandi
Created:
2020-08-13
Contributed By:
Archives and Special Collections, Kathryn A. Martin Library, University of Minnesota Duluth
Many imaging techniques acquire information about an underlying image by making indirect linear measurements. For example, in computed tomography we observe line integrals through the image, while in MRI we observe samples of the image's Fourier transform.To acquire an N-pixel image, we will in general need to make at least N measurements.What h...
Creator:
Romberg, Justin (California Institute of Technology)
Created:
2006-01-09
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
The inverse photolithography problem is a key step in the production of integrated circuits. I propose a regularization and computation strategy for this optimization problem, whose key feature is a regularization procedure for a suitable thresholding operation. The validity of the method is shown by a convergence analysis and by numerical exper...
Creator:
Rondi, Luca (Università di Trieste)
Created:
2016-12-14
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
Feynman diagrams were introduced by physicists. They arise naturallyin mathematics (from knots and singular knots), and in molecularbiology (from RNA folding). In particular, work of G. Vernizzi, H.Orland, and A. Zeehas shown that the 'genus' of Feynman diagrams plays an important rolein the prediction of RNA structures.The transition polynomial...
Creator:
Rong, Yongwu (George Washington University)
Created:
2007-10-31
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
