Bogdan Grechuk
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      • Bogdan Grechuk
      • 6 Jan 2026
        • created 6 Jan 2026 12:15
        • updated 9 Jan 2026 09:25
      • 1 category
        • Seminar announcements

      Boaz Klartag’s talk on Sphere packing

  • Favorite theorems

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      • Bogdan Grechuk
      • 16 Jan 2026
      • 1 category
        • Favorite theorems

      On the zero set of linear recurrences

      • Bogdan Grechuk
      • 9 Jan 2026
        • created 9 Jan 2026 10:19
        • updated 9 Jan 2026 10:20
      • 1 category
        • Favorite theorems

      Cycle decompositions of complete graphs

      • Bogdan Grechuk
      • 2 Jan 2026
        • created 2 Jan 2026 10:58
        • updated 9 Jan 2026 09:06
      • 1 category
        • Favorite theorems

      The Modularity Theorem

      • Bogdan Grechuk
      • 2 Jan 2026
        • created 2 Jan 2026 09:42
        • updated 16 Jan 2026 10:57
      • 1 category
        • Favorite theorems

      My favorite theorems

  • Recent developments

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      • Bogdan Grechuk
      • 21 Jan 2026
      • 1 category
        • Recent developments

      On the solubility of the negative Pell equation

      • Bogdan Grechuk
      • 13 Jan 2026
        • created 13 Jan 2026 15:09
        • updated 14 Jan 2026 08:51
      • 1 category
        • Recent developments

      The hottest and coldest points on a triangle

      • Bogdan Grechuk
      • 12 Jan 2026
      • 1 category
        • Recent developments

      Squaring the circle with Jordan measurable pieces

      • Bogdan Grechuk
      • 10 Jan 2026
        • created 10 Jan 2026 10:16
        • updated 10 Jan 2026 10:56
      • 1 category
        • Recent developments

      Exponentially better Ramsey upper bounds

      • Bogdan Grechuk
      • 8 Jan 2026
        • created 8 Jan 2026 10:01
        • updated 10 Jan 2026 08:51
      • 1 category
        • Recent developments

      Diophantine approximation on fractal sets

      • Bogdan Grechuk
      • 7 Jan 2026
      • 1 category
        • Recent developments

      The density version of Hindman’s finite sums theorem

      • Bogdan Grechuk
      • 5 Jan 2026
        • created 5 Jan 2026 11:18
        • updated 9 Jan 2026 09:16
      • 1 category
        • Recent developments

      The three dimensional Kakeya conjecture is true

      • Bogdan Grechuk
      • 4 Jan 2026
        • created 4 Jan 2026 11:44
        • updated 9 Jan 2026 09:10
      • 1 category
        • Recent developments

      The congruent number problem, and Goldfeld’s conjecture

      • Bogdan Grechuk
      • 3 Jan 2026
      • 1 category
        • Recent developments

      Almost all Markoff numbers are composite

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