This site is devoted to mathematics and its applications. Created and run by Peter Saveliev.

# Greatest formulas

Euler-Poincare formula: $$χ(K) = ∑_k(-1)^kβ_k(K)$$
Stokes theorem: $$\int_σ dω = \int_{∂σ} ω,$$
Gauss-Bonnet formula $$ʃʃ_MKdV=2πχ(M).$$
More odd then beautiful: $$e^{\pi i}=-1.$$