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MMM – Memos on Math/Music: This site lists memos on music and math by the site owner.

The music will be listed as mp3 files. Those files have a portrait of the composer as an eye-catcher:
e.g., J. S. Bach’s music on periodic instrumentation has the following portrait,

whereas modern interpretation of J.S. Bach’s music has the following portrait.

Many thanks from the site owner to MuseScore https://musescore.com/ without which he can never create mp3 files.
The math will be listed as PDF files. Some of them are typed using conventional word processors, and others are in LaTeX. Those files have “Girl with a Pearl Earring” by Johannes Vermeer as an eye-catcher: see below.

The site owner would like to express his appreciation to his cousin and the spouse (of the cousin) for suggesting that he should set up a site to list his “achievement” so far.
To view the content, click the URL line for each index below.
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Index for the work by J. S. Bach
https://wordpress.com/post/mathmusic52.com/2030
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Index for memo on mathematics
https://wordpress.com/post/mathmusic52.com/2038
Index for the work by D. Scarlatti
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BWV 876: J. S. Bach “Prelude and Fugue” in E flat major, The Well-Tempered Clavier II-VII

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BWV 875: J. S. Bach “Prelude and Fugue” in D minor, The Well-Tempered Clavier II-VI

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BWV 874: J. S. Bach “Prelude and Fugue” in D major, The Well-Tempered Clavier II-V

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The Eckmann-Hilton argument

This “argument” is famous for being used to prove the commutativity of the fundamental groups of H-spaces, hence the commutativity of higher homotopy groups.
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BWV 873: J.S. Bach “Prelude and Fugue” in C sharp minor, The Well-Tempered Clavier II-IV

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BWV 872: J. S. Bach “Prelude and Fugue” in C sharp major, The Well-Tempered Clavier II-III

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BWV 871: J.S. Bach “Prelude and Fugue” in C minor, The Well-Tempered Clavier II-II

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BWV 870: J. S. Bach “Prelude and Fugue” in C major, The Well-Tempered Clavier II-I

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On some factor ring of a polynomial ring over Z

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BWV 869: J. S. Bach “Prelude and Fugue” in B minor, The Well-Tempered Clavier I-XXIV
