Search Results - "Williamson, S. Gill"
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1
Top-Down Calculus: A Concise Course
Published 1987“…This textbook was designed for a first course in differential and integral calculus, and is directed toward students in engineering, the sciences, mathematics,…”
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2
On P=NP Either False or Independent of ZFC
Published 30-03-2024“…Our main result, Theorem 3.3, uses Friedman's Jump Free Theorem, Theorem 2.7, which he has shown to be independent of ZFC, the usual axioms of set theory. We…”
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Research problem: combinatorial and multilinear aspects of sign-balanced posets
Published in Linear & multilinear algebra (01-10-2001)“…We present basic results and open problems related to the study of sets L(P) of linear extensions of posets (P, ⪯). In our study, these linear extensions are…”
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A loop-free algorithm for generating the linear extensions of a poset
Published in Order (Dordrecht) (01-01-1995)Get full text
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Subset Sum Instances in ZFC Limbo
Published 09-12-2020“…Our main result, Theorem 2.5, shows the existence of a vast infinity of subset sum problems solvable in polynomial time. The only proof we have of this result…”
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On the difficulty of proving P equals NP in ZFC
Published 25-07-2019“…Harvey Friedman, in his remarkable paper Finite functions and the necessary use of large cardinals, Ann. Math. 148:803-893, 1998 and in a technical report,…”
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ZFC independence and subset sum
Published 28-08-2017“…We study recursively defined functions associated with directed graphs on the k dimensional nonnegative integral lattice. The existence of certain…”
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Lattice exit models
Published 18-05-2017“…We discuss a class of problems which we call lattice exit models. At one level, these problems provide undergraduate level exercises in labeling the vertices…”
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Tensor spaces - the basics
Published 08-10-2015“…We present the basic concepts of tensor products of vector spaces, emphasizing linear algebraic and combinatorial techniques as needed for applied areas of…”
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The common-submatrix Laplace expansion
Published 20-05-2015“…We state and prove a classical version of the Laplace expansion theorem where all submatrices in the expansion are restricted to contain a specified common…”
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Matrix Canonical Forms
Published 18-07-2014“…This material is a rewriting and expansion of notes for beginning graduate students in seminars in combinatorics (Department of Mathematics, University of…”
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Recursive projections of symmetric tensors and Marcus's proof of the Schur inequality
Published 19-06-2014“…In a 1918 paper Schur proved a remarkable inequality that related group representations, Hermitian forms and determinants. He also gave concise necessary and…”
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13
Straightening Bases for Tensor Products
Published in Linear & multilinear algebra (01-04-1999)“…Let W = ⊗ n Vbe the nth tensor product of a vector space Vand let{e 1 ,...e d } be a basis for V. Given a weakly increasing functionf,letW f ⊗ n Vbe the…”
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Lattice Multiverse Models
Published 10-09-2010“…Will the cosmological multiverse, when described mathematically, have easily stated properties that are impossible to prove or disprove using mathematical…”
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15
Ranking and unranking trees with given degree sequences
Published 10-09-2010“…In this paper, we provide algorithms to rank, unrank, and randomly generate certain degree-restricted classes of Cayley trees. Specifically, we consider…”
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Ranking and unranking trees with a given number or a given set of leaves
Published 10-09-2010“…In this paper, we provide algorithms to rank and unrank certain degree-restricted classes of Cayley trees (spanning trees of the n-vertex complete graph)…”
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Combinatorics Theory and Applications
Published in The American Mathematical Monthly (01-04-1988)Get full text
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