Similar to ルジャンドルのカイ関数

Incomplete gamma function

Beta function#Incomplete beta function

Sign function

Hurwitz zeta function

Fresnel integral

Heaviside step function

Beta function

Bessel function

Bernoulli polynomials

Heun function

Bose–Einstein statistics

Rising factorial

Polygamma function

Mathieu function

Minkowski's question-mark function

Modular form

Jacobi elliptic functions

Floor and ceiling functions

Mizan Rahman

Lamé function

Ramp function

Lambert W function

Riemann zeta function

G. N. Watson

Mathematics

0.999...

Zero-dimensional space

Zero to the power of zero