An Introduction to Phase-Integral Methods - (Dover Books on Mathematics) by John Heading (Paperback)

This book provides a comprehensive introduction to the phase-integral method in mathematics, also known as the Wentzel-Kramers-Brillouin (WKB) method.

The author successfully navigates between simplistic and rigorous approaches to offer an accessible overview of the subject for advanced undergraduates and graduate students in mathematics and physics.

The book covers a range of topics, including Stokes phenomenon, one and two transition points, and applications to physical problems.

With its emphasis on simplicity and ease of use, this text is an ideal resource for anyone looking to gain a deeper understanding of the phase-integral method.