The product is a Dover Books study guide titled “Functions and Graphs” by authors I. M. Gelfand, E. G. Glagoleva, and E. E. Shnol. Published by Dover Publications, Incorporated in 2002, this trade paperback book covers subjects such as Functional Analysis, Graphic Methods, and Calculus. Specifically designed for high school and elementary school students, this 112-page book provides a comprehensive study guide for those interested in mathematics. With a compact size of 8 x 6.9 inches and weighing 5.6 ounces, this book is a valuable resource for students looking to deepen their understanding of functions and graphs.