This volume contains the invited contributions to the NATO Advanced Research Workshop on Integrable Quantum Field Theories held at the Villa Olmo, Como, Italy, September 14-18, 1992. About 70 researchers from all over world gathered at this in- terdisciplinary workshop, which turned out to be timely and very stimulating. We are grateful to the institutions that made it possible: the NATO Scientific Affairs Divi- sion, the Istituto Nazionale di Fisica Nucleare and the Scuola Internazionale Superiore di Studi Avanzati for financial support, and the Centro A.Volta for hospitality. In the past decades integrability was mostly explored in the framework of mathe- matical physics. However, in the last few years it has become a prominent subject in many domains of theoretical physics: two dimensional statistical mechanical models, two-dimensional conformal field theories and their perturbations, matrix models of two-dimensional gravity. This trend has been confirmed by the workshop: progress has been reported in all of the above topics both from physicists and mathematicians. One can recognize three broad groups of subjects: 1) 2D lattice models and off-critical solvable models, 2) Kac-Moody algebras and their role in integrable theories, 3) matrix models of string theory and their relation with topological and integrable field theories.

This volume contains the invited contributions to the NATO Advanced Research Workshop on Integrable Quantum Field Theories held at the Villa Olmo, Como, Italy, September 14-18, 1992. About 70 researchers from all over world gathered at this in- terdisciplinary workshop, which turned out to be timely and very stimulating. We are grateful to the institutions that made it possible: the NATO Scientific Affairs Divi- sion, the Istituto Nazionale di Fisica Nucleare and the Scuola Internazionale Superiore di Studi Avanzati for financial support, and the Centro A.Volta for hospitality. In the past decades integrability was mostly explored in the framework of mathe- matical physics. However, in the last few years it has become a prominent subject in many domains of theoretical physics: two dimensional statistical mechanical models, two-dimensional conformal field theories and their perturbations, matrix models of two-dimensional gravity. This trend has been confirmed by the workshop: progress has been reported in all of the above topics both from physicists and mathematicians. One can recognize three broad groups of subjects: 1) 2D lattice models and off-critical solvable models, 2) Kac-Moody algebras and their role in integrable theories, 3) matrix models of string theory and their relation with topological and integrable field theories.

GOD, GIVE ME THE STRENGTH TO WRITE. IT IS POWERFUL. IT IS TRUE. SOMEONE, SOMEWHERE, WILL LISTEN.
I am the voice of one crying in the wilderness. I followed a path that always seemed clear, but that in reality was unseen. The path led me here...and now I must stray. Remain until my judgment. My body can travel on, and I can still laugh, but I cannot clear the dust from my feet. I may regret, but cannot repay in this life. If I still live, someday I will try. All that I now can do is write, write in agony for all who travel this way. They will not heed, but at least they will know where they are when they reach these flat lands. You see, there are no more hills to hide behind. I have flattened them all.
Danny is dead - who is speaking?
Danny's spirit.
The mind must 'die' before the spirit can live.
About a boy, written by himself and seen in the writing.
So wrote eighteen-year-old David Schwimmer in the waning months of his life. And all during his seventeen years David also brilliantly recorded - in his journals, poems, and stories - his agonizing struggles with his soul over his psychological and sexual dilemmas.
Through his journals, we also see David strive to become a writer, a long distance runner, an outdoorsman and a friend. We are with him as he begins to experience his sexuality an we watch his spirituality flower beside it. We observe him wrestling with personal relationships in high school and college, see his efforts to question and direct his body, mind, and spirit, carefully nurturing his own conception of himself, while attempting to deal with his inner problems. We watch him work at practicing unconditional love.
This record ofDavid's inner life has been compiled and edited by David' s father, George Schwimmer, Ph. D. It is a ritual journey through the mind and soul of David, in which David tries to search out who he is and why he is on Earth. This is the fundamental search that all human beings undertake during their life, to discover who they really are. Everyone who has read David's journals describes David's writing as deeply moving, touching all who experience it.