Techniques on Jasperhttps://jasper-aa64.github.io/tags/techniques/Recent content in Techniques on JasperHugoen-usTue, 28 Apr 2026 00:00:00 +0800Number Theory #2-ex: Möbius Techniqueshttps://jasper-aa64.github.io/posts/number-theory-2-ex-mobius-techniques/Tue, 28 Apr 2026 00:00:00 +0800https://jasper-aa64.github.io/posts/number-theory-2-ex-mobius-techniques/Seven core techniques for Möbius inversion problems: loop shortening, gcd indicator expansion, coprimality reduction, Dirichlet convolution via T=dk, divisor symmetry, diagonal symmetry, and value-domain cnt[] tricks.