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  2. Seven Bridges of Königsberg - Wikipedia

    en.wikipedia.org/wiki/Seven_Bridges_of_Königsberg

    The Seven Bridges of Königsberg is a historically notable problem in mathematics. Its negative resolution by Leonhard Euler , in 1736, [ 1 ] laid the foundations of graph theory and prefigured the idea of topology .

  3. Bristol Bridges Walk - Wikipedia

    en.wikipedia.org/wiki/Bristol_Bridges_Walk

    The Bristol Bridges Walk is a circular hiking route that is linked to the Königsberg bridge problem, a mathematical puzzle, which laid the foundation for graph theory, the mathematical study of networks. [2] [3] [4] The Bristol Bridges Walk presents a solution of the puzzle for the city of Bristol. [5]

  4. Handshaking lemma - Wikipedia

    en.wikipedia.org/wiki/Handshaking_lemma

    Otherwise, the problem cannot be solved. In the case of the Seven Bridges of Königsberg, the graph representing the problem has four odd vertices, and has neither an Euler path nor an Euler tour. [3] It was therefore impossible to tour all seven bridges in Königsberg without repeating a bridge.

  5. Graph theory - Wikipedia

    en.wikipedia.org/wiki/Graph_theory

    The Königsberg Bridge problem. The paper written by Leonhard Euler on the Seven Bridges of Königsberg and published in 1736 is regarded as the first paper in the history of graph theory. [20] This paper, as well as the one written by Vandermonde on the knight problem, carried on with the analysis situs initiated by Leibniz.

  6. Leonhard Euler - Wikipedia

    en.wikipedia.org/wiki/Leonhard_Euler

    In 1735, Euler presented a solution to the problem known as the Seven Bridges of Königsberg. [91] The city of Königsberg , Prussia was set on the Pregel River, and included two large islands that were connected to each other and the mainland by seven bridges.

  7. Graph Theory, 1736–1936 - Wikipedia

    en.wikipedia.org/wiki/Graph_Theory,_1736–1936

    First edition. Graph Theory, 1736–1936 is a book in the history of mathematics on graph theory.It focuses on the foundational documents of the field, beginning with the 1736 paper of Leonhard Euler on the Seven Bridges of Königsberg and ending with the first textbook on the subject, published in 1936 by Dénes Kőnig.

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. Eulerian path - Wikipedia

    en.wikipedia.org/wiki/Eulerian_path

    They were first discussed by Leonhard Euler while solving the famous Seven Bridges of Königsberg problem in 1736. The problem can be stated mathematically like this: Given the graph in the image, is it possible to construct a path (or a cycle; i.e., a path starting and ending on the same vertex) that visits each edge exactly once?