The product is a Dover paperback textbook titled "Differential Geometry" by Erwin Kreyszig, published in 1991. This advanced-level textbook covers the subject of differential geometry and is part of the Dover Books on Mathematics series. It is unabridged and contains 352 pages, making it a comprehensive resource for adult education and further education students studying this subject. Written in English, this math textbook is a valuable addition to any student's library for exploring the intricacies of differential geometry. T