Ahrens, W.

Japanese: Ahrens,W.(英語表記)AhrensW
Ahrens, W.

…Euler proved that a unilinear circuit can be drawn only when there are two or no odd points. Figure 17-a is a problem found in W. Ahrens' Mathematical Games, Vol. 2 (1918), and although it looks quite complicated, if you confirm that only points A and B are odd points, you can easily obtain the solution shown in Figure 17-b. A topology puzzle similar to a unilinear circuit is the Hamiltonian circuit problem. …

*Some of the terminology that mentions "Ahrens, W." is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…オイラーは奇数の点が2個か1個もない場合だけ一筆書きができることを証明した。図17‐aはアーレンスW.Ahrens著の《数学遊戯》第2巻(1918)にある問題で,かなり複雑そうに見えるけれども,A点とB点だけが奇数の点であることを確認すれば図17‐bのような解が簡単に得られる。一筆書きと似たトポロジーパズルにハミルトン閉路の問題がある。…

※「Ahrens,W.」について言及している用語解説の一部を掲載しています。

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