  These lecture notes provide a concise, rapid and pedagogical introduction to
several advanced topics in contemporary cosmology. The discussion of thermal
history of the universe, linear perturbation theory, theory of CMBR temperature
anisotropies and the inflationary generation of perturbation are presented in a
manner accessible to someone who has done a first course in cosmology. The
discussion of dark energy is more research oriented and reflects the personal
bias of the author. Contents: (I) The cosmological paradigm and Friedmann model
(II) Thermal history of the universe (III) Structure formation and linear
perturbation theories (IV) Perturbations in dark matter and radiation (V)
Transfer function for matter perturbations (VI) Temperature anisotropies of
CMBR (VII) Generation of initial perturbations from inflation (VIII) The dark
energy.
