Titlebook: Classic Papers in Combinatorics; Ira Gessel,Gian-Carlo Rota Book 19871st edition Birkh?user Boston 1987 Acyclic orientations of graphs.Com

只看該作者 · 發(fā)表于 2025-3-30 08:44:49

The Dissection of Rectangles Into Squares,e . into a finite number . of non-overlapping squares is called a . of . of .; and the . squares are the . of the dissection. The term “elements” is also used for the lengths of the sides of the elements. If there is more than one element and the elements are all unequal, the squaring is called ., and . is a ..

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A Partition Calculus in Set Theory, as follows. .. In 1930 F. P. Ramsey [12] discovered a remarkable extension of this principle which, in its simplest form, can be stated as follows. Let . be the set of all positive integers and suppose that all unordered pairs of distinct elements of . are distributed over two classes.

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On a Problem of Formal Logic, to determine the truth or falsity of any given logical formula*. But in the course of this investigation it is necessary to use certain theorems on combinations which have an independent interest and are most conveniently set out by themselves beforehand.

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On Representatives of Subsets,s. Then it is always possible to find a set . of . things of . which is at one and the same time a C.S.R. (= complete system of rcpresentatives) for the (.)-classes, and also a C.S.R. for the (.)-classes.

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只看該作者 · 發(fā)表于 2025-3-31 14:32:21

A Partition Calculus in Set Theory, as follows. .. In 1930 F. P. Ramsey [12] discovered a remarkable extension of this principle which, in its simplest form, can be stated as follows. Let . be the set of all positive integers and suppose that all unordered pairs of distinct elements of . are distributed over two classes.

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只看該作者 · 發(fā)表于 2025-3-31 22:56:56

Graph Theory and Probability, independent points or a complete graph of order ., but there exists a graph of . – 1 vertices which does not contain a complete subgraph of . vertices and also does not contain a set of . independent points. (A graph is called complete if every two of its vertices are connected by an edge; a set of

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