Hadamard's gamma function
EXTENSION OF THE FACTORIAL FUNCTION DIFFERENT FROM THE GAMMA FUNCTION.
Hadamard’s gamma function; Hadamard's Gamma function; Hadamard's Gamma Function
In mathematics, Hadamard's gamma function, named after Jacques Hadamard, is an extension of the factorial function, different from the classical gamma function. This function, with its argument shifted down by 1, interpolates the factorial and extends it to real and complex numbers in a different way than Euler's gamma function.