函数的零点

argument of a function extension of a function difference of a function genus of a meromorphic function harmonic expansion of a function residue of a function at a pole zero Bessel function ordinary derivative of a set function proximity of zero order multiplicity of zero field of zero sequence check of zero integral of a function oscillation of a function increment of a function differentiation of a function minimum of a function residue of a function period of a function pole of a function inverse of a function element of a function