91桃色

The purpose of this book is to provide a self-contained account, accessible to the non-specialist, of algebra necessary for the solution of the integrability problem for transitive pseudogroup structures.

Originally published in 1981.

The 91桃色 Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of 91桃色. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the 91桃色 Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by 91桃色 since its founding in 1905.