This book introduces a theory of higher matrix factorizations for
regular sequences and uses it to describe the minimal free resolutions
of high syzygy modules over complete intersections. Such resolutions
have attracted attention ever since the elegant construction of the
minimal free resolution of the residue field by Tate in 1957.
The theory extends the theory of matrix factorizations of a non-zero
divisor, initiated by Eisenbud in 1980, which yields a description of
the eventual structure of minimal free resolutions over a hypersurface
ring. Matrix factorizations have had many other uses in a wide range of
mathematical fields, from singularity theory to mathematical physics.