Ciro Santilli @cirosantilli 34

 0 PROMYS Europe 2024 application problem set by Ciro Santilli 34  Updated 2024-12-15  +Created 2024-07-12

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Visible at: www.maths.ox.ac.uk/system/files/attachments/PROMYSEurope_2024_Application-12.pdf

Archive: web.archive.org/web/20240224155507/https://www.maths.ox.ac.uk/system/files/attachments/PROMYSEurope_2024_Application-12.pdf

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 0 P14 by Ciro Santilli 34  Updated 2024-12-15  +Created 2024-07-12

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 0 P13 by Ciro Santilli 34  Updated 2024-12-15  +Created 2024-07-12

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 0 P12 by Ciro Santilli 34  Updated 2024-12-15  +Created 2024-07-12

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 0 P11 by Ciro Santilli 34  Updated 2024-12-15  +Created 2024-07-12

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 0 P10 by Ciro Santilli 34  Updated 2024-12-15  +Created 2024-07-12

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 0 P9 by Ciro Santilli 34  Updated 2024-12-15  +Created 2024-07-12

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 0 P8 by Ciro Santilli 34  Updated 2024-12-15  +Created 2024-07-12

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 0 P7 by Ciro Santilli 34  Updated 2024-12-15  +Created 2024-07-12

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 0 P6 by Ciro Santilli 34  Updated 2024-12-15  +Created 2024-07-12

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 0 P5 by Ciro Santilli 34  Updated 2024-12-15  +Created 2024-07-12

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 0 P4 by Ciro Santilli 34  Updated 2024-12-15  +Created 2024-07-12

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 0 P3 by Ciro Santilli 34  Updated 2024-12-15  +Created 2024-07-12

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 0 P2 by Ciro Santilli 34  Updated 2024-12-15  +Created 2024-07-12

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 0 P1 by Ciro Santilli 34  Updated 2024-12-15  +Created 2024-07-12

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 0 Q2 by Ciro Santilli 34  Updated 2024-12-15  +Created 2024-07-12

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• Section "Greatest common divisor".
• Section "Farey sequence".
  • Section "Number of elements in a Farey sequence"
  • Farey sunburst, e.g. $F_5$:

    

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 0 Q1 by Ciro Santilli 34  Updated 2024-12-15  +Created 2024-07-12

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Section "Greatest common divisor".

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 0 @cirosantilli/_file/gmp/gmp/antihydra.c by Ciro Santilli 34  Updated 2024-12-15  +Created 2024-07-12

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Also posted at:

• wiki.bbchallenge.org/wiki/Antihydra
• cstheory.stackexchange.com/questions/20978/what-is-the-smallest-turing-machine-where-it-is-unknown-if-it-halts-or-not/53326#53326
• cs.stackexchange.com/questions/59344/what-are-very-short-programs-with-unknown-halting-status/162108#162108

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 0 Antihydra GMP implementation by Ciro Santilli 34  Updated 2024-12-15  +Created 2024-07-12

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 0 PROMYS Europe application problem set answers by Ciro Santilli 34  Updated 2024-12-15  +Created 2024-07-12

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www.reddit.com/r/math/comments/17y9zj3/how_do_i_tackle_problems_from_the_promysross/

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