ひとふでが
一筆書き
1. one-stroke sketch; unicursal
2. Seven Bridges of KönigsbergThe Seven Bridges of Königsberg is a historically notable problem in mathematics. Its negative resolution by Leonhard Euler in 1735 laid the foundations of graph theory and prefigured the idea of topology. The city of Königsberg in Prussia was set on both sides of the Pregel River, and included two large islands which were connected to each other and the mainland by seven bridges. The problem was to find a walk through the city that would cross each bridge once and only once.
Read “Seven Bridges of Königsberg” on English Wikipedia
Read “一筆書き” on Japanese Wikipedia
Read “Seven Bridges of Königsberg” on DBpedia
Read “Seven Bridges of Königsberg” on English Wikipedia
Read “一筆書き” on Japanese Wikipedia
Read “Seven Bridges of Königsberg” on DBpedia
一筆書き 【いっぴつがき】
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