Utility functions for computing with spectral functions and Green functions.

cached_hilbertOps.m: master function returning hilbert transform functions.

Real line Hilbert transform on uniformly spaced grids. cached_naiveH ≈ hilbert in matlab. cached_naiveHc

Real line Hilbert transform on log-linear-log grids. block_Htransf.m block_Hctransf.m block_Htransf_mat.m

search_linlog_om.m: return a log-linear-log grid. uniformSubindex.m: helper function returning the indices to longest uniform part of a grid.

FDBE.m: returns a collection of Fermi-Dirac and Einstein-Boltzmann distributions. Computed in a even-odd symmetric way in frequency, and avoids divergence at zero.