Contents: Thanks for watching. After reviewing what pencil of circles or lines was, I explain the generalisation of pencil. I don’t know why it is called pencil in English. Does anybody know it?
まずは皆さんご存知円束・直線束の復習を一般化への展望を意識しながらざっくりみて、一般論をきちんと解説します。一次元じゃ足りない、二次元じゃ多い、ならば無限遠点完備化じゃい。お楽しみに。
Twitter link: MT 数学・maths channel@maths_mt
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[[リンク集 links]]
オイラーの公式 Euler’s formula
[27] https://youtu.be/9VC1v1Vwojg
フェルマーの小定理プレイリスト Playlist of Fermat’s little theorem.
https://www.youtube.com/playlist?list=PLlA6jgaa1nvgFSD5X50Gb6oYhcQQ-Nhph
漸化式の構造プレイリスト Playlist of recursive formula.
https://www.youtube.com/playlist?list=PLlA6jgaa1nvgZkHCWbf-vkBDiOxfctZAa
和分差分について Discrete differentiation and summation.
解説 Theoretical explanation.
[221] https://youtu.be/zLg5T2iVaeQ
[222] https://youtu.be/QGnvFSfaJLU
冪乗和の公式 Power sum.
[130] https://youtu.be/nNgPsVTt8e0
[131] https://youtu.be/9Ge7IkL2aTk
難しくなる構造(複雑に見える漸化式) looks-difficult recursive relation.
[243] https://youtu.be/sQeNmI9Xucc
[244] https://youtu.be/tmB3jWSQ6Ts
[245] https://youtu.be/6yncOC0Bskg
[246] https://youtu.be/P-h-BdKllqE
[251] https://youtu.be/glpXNAhncuA
[268] https://youtu.be/Lu6rTjRnvD8
[269] https://youtu.be/2I9lzATi0Sk
カタラン数 Catalan number
解説 explanation. [54] https://youtu.be/rfQ4O2hfba0
演習 practice. [53] https://youtu.be/GQ53HD6UDsQ
定義漸化式を解く[276] https://youtu.be/hnGWEm28LhQ
母関数
漸化式を解く[274]https://youtu.be/Z41JGtNIRPg
カタラン数 [276] https://youtu.be/hnGWEm28LhQ
フィボナッチ数列とパスカルの三角形 [277] https://youtu.be/VYNr9sQMQQE
外積ベクトル cross product
解説 explanation
[76] https://youtu.be/IrfE3r5Nzok
[78] https://youtu.be/bopooyIvxJE
演習 practice
[77] https://youtu.be/GKIUBtm6Kq4
[84] https://youtu.be/sWUg145IxGQ
[102] https://youtu.be/-5FkBTYJXBw
[267] https://youtu.be/Vcwm-K9s9gQ
ベクトルの斜交座標 general coordinates system and vectors.
[3] https://youtu.be/385ffT7WLo8
[75] https://youtu.be/lHbGi7hbmk0
重心座標とベクトル gravity-point coordinates system and vectors.
[72] https://youtu.be/FTp3QcNuylc
[73] https://youtu.be/AwiMgtX3hLY
[74] https://youtu.be/WX3IoetYZqY
[194] https://youtu.be/RTRlPz3rS08
[198] https://youtu.be/ri8v41VXCfw
テイラー展開 Taylor expansion.
解説 explanation
[231] https://youtu.be/7xqX-6FhQjg
[232] https://youtu.be/QRBpYuN_gEw
[233] https://youtu.be/dC-vI6yOjTQ
演習 practice
[234] https://youtu.be/EIRCItnCPWo
[235] https://youtu.be/X5i5pX7Dwnc
無限級数と微積分 infinite series and Taylor expansion.
[117] https://youtu.be/pKbOjo4RuB8
[118] https://youtu.be/zPxEKh_ZHvs
二項関係 combinatorial formula.
解説 explanation [16] https://youtu.be/c0CyPTw4bQ0
演習 practice [15] https://youtu.be/1DIMOJy432o
二元二次不定方程式
解説 explanation [177] https://youtu.be/8-6vK4Yf-Z8
曲率半径 curvature of parametrised curve.
[216] https://youtu.be/eETH5EARNsQ
[217] https://youtu.be/EL0fivqBXaA
[218] https://youtu.be/wiuS1XjXoXs
多項式の合同式 congruence notation for polynomials
[97] https://youtu.be/Gy7EcuHIF0Y
[211] https://youtu.be/JZwlmaq6Cqg
重複組合せ repetitive combinatorics
[8] https://youtu.be/2jBTTxyfMSg
[86] https://youtu.be/Dz3NEYfxcd0
[87] https://youtu.be/4tRblv3dhvI
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I usually make videos about mathematics, but any kinds of topics which I find interesting and attractive. All I want to do is just discuss and talk about them, and communicate with people who are into maths, after all. I am afraid to say that I basically speak in Japanese in my videos; however, I am going to try and write things down in the way everyone can comprehend what they are, not without mathematics literacy at least :-).
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