Many fundamental theories of modern physics can be considered as descriptions of dynamical systems subjected to constraints. The study of these constrained dynamical systems, and in particular the problems of formulating them as quantum systems, has many profound links with geometry. These links were explored in the Symposium on Geometry and Gravity held at the Newton Institute in 1994. This book, which arose from a conference held during that symposium, is a collection of papers devoted to problems such as Chern-Simons theory, sigma-models, gauge invariance and loop quantization, general...

In this fascinating book, John Charap offers a panoramic view of the physicist's world as the twenty-first century opens--a view that is entirely different from the one that greeted the twentieth century. We have learned that the universe is billions of galaxies larger than we imagined--and billions of years older. We know more about how it came to be and what it is. Because of physics, we live in a world of greater danger and more convenience, smaller particles and bigger ideas.

Charap introduces these ideas but spares us the math behind them. After a review of the twentieth...

Many fundamental theories of modern physics can be considered as descriptions of dynamical systems subjected to constraints. The study of these constrained dynamical systems, and in particular the problems of formulating them as quantum systems, has many profound links with geometry. These links were explored in the Symposium on Geometry and Gravity held at the Newton Institute in 1994. This book, which arose from a conference held during that symposium, is a collection of papers devoted to problems such as Chern-Simons theory, sigma-models, gauge invariance and loop quantization, general...

A revised and updated edition of the classic handbook for women seeking a safe, organic, eco-friendly, and natural pregnancy, featuring an integrative-based approach with new medical, herbal, and nutritional information.

Every mother wants the best for her unborn child, from the baby's conception to birth. What's more, every mother wants clear, straightforward information delivered in a calm, empowering voice from someone who knows the facts. Enter Dr. Aviva Jill Romm, an expert in natural childbirth with more than twenty years of experience in both alternative and allopathic...