--- title: The Perfect Math Class date: '2024-09-15' tags: ["Cirno"] --- # Content Here are some contents for the perfect math class. [A link](https://example.com) ```lean theorem perfect_number_theorem (n: Nat), Nat.is_odd → ¬perfect n := by intro h apply cirno_theorem ``` > :>WARNING > The proof is elusive! Some KaTeX: $a^n + b^n = c^n$. $$ \Gamma(z) = \int_0^\infty e^{-t} t^{z-1}\,\mathrm dz $$ $$ \vec z^{(l+1)} = \mat M\vec z^{(l)} + \vec b $$