Weak lensing in non-statistically isotropic universes
  The Bipolar Spherical Harmonics (BipoSH) form a natural basis to study the
CMB two point correlation function in a non-statistically isotropic (non-SI)
universe. The coefficients of expansion in this basis are a generalisation of
the well known CMB angular power spectrum and contain complete information of
the statistical properties of a non-SI but Gaussian random CMB sky. We use
these coefficients to describe the weak lensing of CMB photons in a non-SI
universe. Finally we show that the results reduce to the standard weak lensing
results in the isotropic limit.
