The successful calculation of critical exponents 
for continuous phase transitions 
is one of the main achievements of theoretical physics 
over the last twenty five years. 
This was achieved through the use of scaling 
and field-theoretic techniques which have since become 
standard equipment in many areas of physics, 
especially quantum field theory. 
This book provides a thorough introduction 
to these techniques at a level suitable for beginning graduate students. 
The text assumes only a sound undergraduate background in physics and mathematics. 
Continuous phase transitions are introduced, 
then the necessary statistical mechanics are summarized, 
followed by standard models, some exact solutions, 
and techniques for numerical simulation. 
Next, the real-space renormalization group 
and mean-field theory are explained and illustrated. 
The last eight chapters cover the Landau–Ginzburg model, 
from physical motivation, through diagrammatic perturbation theory and renormalization, 
to the renormalization group and the calculation of 
critical exponents above and below the critical temperature.