Evaluation of a class of diagrams useful in many-body calculations

Static properties of nuclear matter within the Boson Loop Expansion

“…Note however that the difficulties met in Refs. [18,28] mainly derived from the kinematical singularities in Eq. (27).…”

Nonlinear, Band-Structure, and Surface Effects in the Interaction of Charged Particles with Solids

“…[52] and [16,29], respectively, and an extension to imaginary frequencies was later reported in Ref. [53].…”

The generalised relativistic Lindhard functions

“…Since we shall consider (pseudo-)scalar and (pseudo-)vector couplings, our LFs will carry 0, 1 or 2 vector indices only. Tensor couplings could bring into play other functions (U * [3] rel and U * [4] rel ), but they seem not to be, at present, of physical interest. and using the identity…”

“…The explicit form of (1) is known since 1954 [2] and, more recently [3,4], has been expressed according to …”