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pro vyhledávání: '"Muller, Stefan"'
Parallel programs are frequently modeled as dependency or cost graphs, which can be used to detect various bugs, or simply to visualize the parallel structure of the code. However, such graphs reflect just one particular execution and are typically c
Externí odkaz:
http://arxiv.org/abs/2311.06984
Autor:
Muller, Stefan K., Singer, Kyle, Keeney, Devyn Terra, Neth, Andrew, Agrawal, Kunal, Lee, I-Ting Angelina, Acar, Umut A.
Many concurrent programs assign priorities to threads to improve responsiveness. When used in conjunction with synchronization mechanisms such as mutexes and condition variables, however, priorities can lead to priority inversions, in which high-prio
Externí odkaz:
http://arxiv.org/abs/2304.03753
We consider Rumin's filtration on the de Rham complex of a Carnot group. Although Pansu pullback by a Sobolev map is filtration preserving, it need not be a chain mapping. Nonetheless, we show that Pansu pullback induces a mapping of the associated s
Externí odkaz:
http://arxiv.org/abs/2205.04302
Let $N\subset GL(n,R)$ be the group of upper triangular matrices with $1$s on the diagonal, equipped with the standard Carnot group structure. We show that quasiconformal homeomorphisms between open subsets of $N$, and more generally Sobolev mappings
Externí odkaz:
http://arxiv.org/abs/2201.01648
We consider mappings between Carnot groups. In this paper, which is a continuation of "Pansu pullback and rigidity of mappings between Carnot groups" (arXiv:2004.09271), we focus on Carnot groups which are nonrigid in the sense of Ottazzi-Warhurst. W
Externí odkaz:
http://arxiv.org/abs/2112.01866
We consider contact manifolds equipped with Carnot-Caratheodory metrics, and show that the Rumin complex is respected by Sobolev mappings: Pansu pullback induces a chain mapping between the smooth Rumin complex and the distributional Rumin complex. A
Externí odkaz:
http://arxiv.org/abs/2101.04528
We derive strain-gradient plasticity from a nonlocal phase-field model of dislocations in a plane. Both a continuous energy with linear growth depending on a measure which characterizes the macroscopic dislocation density and a nonlocal effective ene
Externí odkaz:
http://arxiv.org/abs/2009.03072
We show that in an $m$-step Carnot group, a probability measure with finite $m^{th}$ moment has a well-defined Buser-Karcher center-of-mass, which is a polynomial in the moments of the measure, with respect to exponential coordinates. Using this, we
Externí odkaz:
http://arxiv.org/abs/2007.06694
This is the first in a series of papers on geometric mapping theory in Carnot groups -- and more generally equiregular manifolds -- in which we prove a number of new structural results for Sobolev (in particular quasisymmetric) mappings, establishing
Externí odkaz:
http://arxiv.org/abs/2004.09271
Autor:
Muller, Stefan K., Singer, Kyle, Goldstein, Noah, Acar, Umut A., Agrawal, Kunal, Lee, I-Ting Angelina
Motivated by the increasing shift to multicore computers, recent work has developed language support for responsive parallel applications that mix compute-intensive tasks with latency-sensitive, usually interactive, tasks. These developments include
Externí odkaz:
http://arxiv.org/abs/2004.02870