  The main issues of the spectral theory of Dirac operators are presented,
namely: transformation operators, asymptotics of eigenvalues and
eigenfunctions, description of symmetric and self-adjoint operators in Hilbert
space, expansion in eigenfunctions, uniqueness theorems in inverse problems,
constructive solution of inverse problems, description of isospectral
operators, and some other questions. This book is aimed at specialists in
spectral theory and graduate students of mathematics at universities.
