Logarithmic derivative of the Euler Γ-function in Clifford analysis

The logarithmic derivative of the Gamma-function, namely the psi-function, has numerous applications. We define analogous functions in a four dimensional space. We cut lattices and obtain Clifford-valued functions. These functions are holomorphic cliffordian and have similar properties as the psi-function. These new functions show links between well-known constants: the Euler gamma constant and some generalisations, zeta(R)(2), zeta(R)(3). We get also the Riemann zeta function and the Epstein zeta functions.