Trigamma Function: Polygamma Function, Digamma Hurwitz Zeta Function

Shintani Zeta Function: Riemann Function, Takuro Shintani, Hurwitz Function

Selberg Zeta Function: Atle Selberg, Riemann Function, Function

Zeta: Greek Alphabet, Riemann Zeta Function, Numerals, Phoenician Digamma, Damping Ratio

Riemann Xi Function: Mathematics, Zeta Function