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Paul Arnold Wiegert (born 1967) is a Canadian astronomer, discoverer of minor planets and professor at the University of Western Ontario. [2]Wiegert studies unusual orbits of both observed objects and theorised classes of objects, for example, one early paper [3] considers not-known-to-exist planets orbiting the nearby Alpha Centauri star system, while later papers extend that case to more ...
Christopher Hall is an American cryptographer and mathematician, specializing in arithmetic geometry.He is one of the creators of the cryptosystem Twofish. [1] He obtained a BS from the University of Colorado-Boulder Department of Computer Science and a PhD in Mathematics from Princeton University in 2003, under Nick Katz.
A minor of an undirected graph G is any graph that may be obtained from G by a sequence of zero or more contractions of edges of G and deletions of edges and vertices of G.The minor relationship forms a partial order on the set of all distinct finite undirected graphs, as it obeys the three axioms of partial orders: it is reflexive (every graph is a minor of itself), transitive (a minor of a ...
Let A be an m × n matrix and k an integer with 0 < k ≤ m, and k ≤ n.A k × k minor of A, also called minor determinant of order k of A or, if m = n, the (n − k) th minor determinant of A (the word "determinant" is often omitted, and the word "degree" is sometimes used instead of "order") is the determinant of a k × k matrix obtained from A by deleting m − k rows and n − k columns.
Kim grew up in Toronto. His first language was Finnish. He obtained a bachelor's degree in engineering physics with honors from the University of Toronto.In 1960, he received his master's degree in applied mathematics at the University of Waterloo.
Many mathematical problems have been stated but not yet solved. These problems come from many areas of mathematics, such as theoretical physics, computer science, algebra, analysis, combinatorics, algebraic, differential, discrete and Euclidean geometries, graph theory, group theory, model theory, number theory, set theory, Ramsey theory, dynamical systems, and partial differential equations.
A shallow minor of a graph G is a minor in which the edges of G that were contracted to form the minor form a collection of disjoint subgraphs with low diameter. Shallow minors interpolate between the theories of graph minors and subgraphs, in that shallow minors with high depth coincide with the usual type of graph minor, while the shallow ...
mathNEWS is the freeform student publication of the undergraduate mathematics students of the University of Waterloo as represented by MathSoc (the Mathematics Society of the University of Waterloo). [195] Labeling itself as "Waterloo's Bastion of Erudite Thought", mathNEWS is published biweekly, with occasional deviations and special editions.