Results 81 to 90 of about 14,747,589 (248)
Distance geometry and geometric algebra
, 1993 Dress A, Havel TF. Distance geometry and geometric algebra. Foundations of Physics . 1993;23(10):1357-1374.As part of his program to unify linear algebra and geometry using the language of Clifford algebra, David Hestenes has constructed a (well-known ...
Havel, Timothy F., Dress, Andreas
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Clarke Transform: A Lingua Franca for Continuum Robotics
Advanced Intelligent Systems, EarlyView.Using the Clarke transform, both robot‐dependent mappings are known exactly for kinematic models, leading to a complete chain of transformations between spaces with associated abstraction. This eases the derivation. Therefore, proposing the Clarke transform as a lingua franca and utilizing a practical fact sheet can pave the way for more systematic ...
Reinhard M. Grassmann, Sami Haddadin
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-theoretic Poirier–Reutenauer bialgebra
, 2016 We use the -Knuth equivalence of Buch and Samuel (2015) to define a -theoretic analogue of the Poirier–Reutenauer Hopf algebra. As an application, we rederive the -theoretic Littlewood–Richardson rules of Thomas and Yong (2009, 2011) and of Buch and ...
Patrias, Rebecca +3 more
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American Journal of Agricultural Economics, EarlyView.Abstract This paper derives a firm‐level threshold, the Herfindahl Neutral Point, from the standard concentration index used in merger review. At this threshold, a marginal expansion leaves the index unchanged. Firms below the threshold reduce concentration when they expand; firms above it increase concentration.
Andrew J. Keller, Krishna P. Paudel
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Fusion category symmetry. Part I. Anomaly in-flow and gapped phases
Journal of High Energy PhysicsWe study generalized discrete symmetries of quantum field theories in 1+1D generated by topological defect lines with no inverse. In particular, we describe ’t Hooft anomalies and classify gapped phases stabilized by these symmetries, including new 1+1D ...
Ryan Thorngren, Yifan Wang
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MathematicsMotivation. Analytic function theory on commutative complex extensions calls for an operator–theoretic calculus that simultaneously sees the algebra-induced coupling among components and supports boundary-to-interior mechanisms. Gap.
Ji Eun Kim
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Formal Semantics: Origins, Issues, Early Impact
The Baltic International Yearbook of Cognition, Logic and Communication, 2010 Formal semantics and pragmatics as they have developed since the late 1960's have been shaped by fruitful interdisciplinary collaboration among linguists, philosophers, and logicians, among others, and in turn have had noticeable effects on developments ...
Barbara H. Partee
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Boundary Algebra: A Simple Notation for Boolean Algebra and the Truth Functors [PDF]
Boundary algebra [BA] is a simpler notation for Spencer-Brown’s (1969) primary algebra [pa], the Boolean algebra 2, and the truth functors. The primary arithmetic [PA] consists of the atoms ‘()’ and the blank page, concatenation, and enclosure between ‘(‘
Philip Meguire
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The Fractal Structure of the Universal Steenrod Algebra: An Invariant-theoretic Description [PDF]
, 2014 As recently observed by the second author, the mod2 universal Steenrod algebra Q has a fractal structure given by a system of nested subalgebras Qs, for s > N, each isomorphic to Q.
CIAMPELLA, ADRIANA, BRUNETTI, MAURIZIO
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Farm labor scarcity and its uneven impacts on crop producers in the United States
American Journal of Agricultural Economics, EarlyView.Abstract This study is the first to evaluate the impacts of farm labor scarcity on producers in the United States across different crop production systems. Between 2002 and 2017, we disentangle the effects of labor scarcity from the impacts of rising commodity demand, technological change, and supply of other inputs on labor market outcomes.
Srabashi Ray +4 more
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