無限 | 数学の星 https://math-jp.net 数とはなにか、無限とはなにか Sun, 05 Oct 2025 13:04:57 +0000 ja hourly 1 https://wordpress.org/?v=6.9 https://math-jp.net/wp-content/uploads/2016/12/cropped-2015-06-06-18.34.04-1-2-32x32.jpg 無限 | 数学の星 https://math-jp.net 32 32 超実数のイメージがわくように説明するよ https://math-jp.net/2021/07/20/%e8%b6%85%e5%ae%9f%e6%95%b0%e3%81%ae%e3%82%a4%e3%83%a1%e3%83%bc%e3%82%b8%e3%81%8c%e3%82%8f%e3%81%8f%e3%82%88%e3%81%86%e3%81%ab%e8%aa%ac%e6%98%8e%e3%81%99%e3%82%8b%e3%82%88/ Tue, 20 Jul 2021 12:20:48 +0000 https://math-jp.net/?p=4437 無限の点の個数が数えられるのなら長さの概念はいらない https://math-jp.net/2018/02/22/ten-kosu-mugen-nagasa-kazoeru/ https://math-jp.net/2018/02/22/ten-kosu-mugen-nagasa-kazoeru/#respond Thu, 22 Feb 2018 03:09:22 +0000 https://math-jp.net/?p=3576 https://math-jp.net/2018/02/22/ten-kosu-mugen-nagasa-kazoeru/feed/ 0 アキレスが亀に追いつかない現象をわかりやすく説明するよ https://math-jp.net/2018/02/21/akiresu-kame-paradokkusu/ https://math-jp.net/2018/02/21/akiresu-kame-paradokkusu/#respond Wed, 21 Feb 2018 07:59:38 +0000 https://math-jp.net/?p=3578 https://math-jp.net/2018/02/21/akiresu-kame-paradokkusu/feed/ 0 数直線上の点と実数が１対１に対応しているなんて真っ赤な嘘 https://math-jp.net/2018/02/21/zissuu-ten-matigai/ https://math-jp.net/2018/02/21/zissuu-ten-matigai/#respond Wed, 21 Feb 2018 02:35:58 +0000 https://math-jp.net/?p=3571 https://math-jp.net/2018/02/21/zissuu-ten-matigai/feed/ 0 偶数と奇数はどちらが多いか https://math-jp.net/2018/02/06/ooi-sukunai/ https://math-jp.net/2018/02/06/ooi-sukunai/#respond Tue, 06 Feb 2018 14:00:00 +0000 https://math-jp.net/?p=3554 https://math-jp.net/2018/02/06/ooi-sukunai/feed/ 0 数列の極限と関数の極限の違い https://math-jp.net/2017/05/27/limit-sequence-function/ https://math-jp.net/2017/05/27/limit-sequence-function/#respond Fri, 26 May 2017 20:29:20 +0000 https://www.math-jp.net/?p=2397 https://math-jp.net/2017/05/27/limit-sequence-function/feed/ 0 公理的集合論から順序数(注意！本当に駄文でゴメン) https://math-jp.net/2017/05/26/axiomatic-set-theory/ https://math-jp.net/2017/05/26/axiomatic-set-theory/#respond Fri, 26 May 2017 13:47:51 +0000 https://www.math-jp.net/?p=2391 https://math-jp.net/2017/05/26/axiomatic-set-theory/feed/ 0 無限大÷無限大が不定とは限らない https://math-jp.net/2017/05/25/infinity-divide-infinity/ https://math-jp.net/2017/05/25/infinity-divide-infinity/#respond Wed, 24 May 2017 16:29:02 +0000 https://www.math-jp.net/?p=2386 https://math-jp.net/2017/05/25/infinity-divide-infinity/feed/ 0 無限大を数列で表すとどうなるか https://math-jp.net/2017/05/24/infinity-sequence/ https://math-jp.net/2017/05/24/infinity-sequence/#respond Tue, 23 May 2017 23:02:08 +0000 https://www.math-jp.net/?p=2377 https://math-jp.net/2017/05/24/infinity-sequence/feed/ 0 無限大×無限大は無限大より大きいか https://math-jp.net/2017/05/23/infinity-multiplied-infinity/ https://math-jp.net/2017/05/23/infinity-multiplied-infinity/#respond Mon, 22 May 2017 23:10:20 +0000 https://www.math-jp.net/?p=2369 https://math-jp.net/2017/05/23/infinity-multiplied-infinity/feed/ 0