This paper is devoted to recent progress made towards the understanding of closed bosonic
and fermionic string perturbation theory, formulated in a Lorentz-covariant way on Euclidean …

We present an account of string field theory which aims to introduce the reader to the
important concepts of the subjects as well as to aid access to the literature. Light cone string …

Twenty-five years ago, Michael Green, John Schwarz, and Edward Witten wrote two
volumes on string theory. Published during a period of rapid progress in this subject, these …

Differential geometry and topology have become essential tools for many theoretical
physicists. In particular, they are indispensable in theoretical studies of condensed matter …

String Theory comprises two volumes which give a comprehensive and pedagogic account
of the subject. Volume 1, first published in 1998, provides a thorough introduction to the …

The high-energy behavior of string scattering amplitudes is studied to all orders in
perturbation theory, with the aim of exploring the short-distance structure of string theory. It is …

Covariant quantization of string theories is developed in the context of conformal field theory
and the BRST quantization procedure. The BRST method is used to covariantly quantize …

The large-energy, fixed-angle, behavior of string scattering amplitudes is considered to
arbitrary order in perturbation theory. It is shown that the path integal over surfaces is …

Inspired by the recent work of Knizhnik, Polyakov and Zamolodchikov on the 2D quantum
gravity in the “light cone” gauge, we present a proposal for solving the theory in the usual …

This timely volume provides a broad survey of (2+ 1)-dimensional quantum gravity. It
emphasises the'quantum cosmology'of closed universes and the quantum mechanics of the …