If This Is a Man to shape the book, giving it a clear sense of direction. In January 1947, the manuscript was rejected by Einaudi. The writers Cesare Pavese and Natalia Ginzburg thought it too early after the war for such an account. Levi managed to find a smaller publisher, De Silva, who printed 2,500 copies of the book, 1,500 of which were sold, mostly in Levi's hometown of Turin. In 1955, Levi signed a contract with Einaudi for a new edition, which was published in 1958. The initial printing of 2000 copies was followed by a second of the same size. An English translation
Inversion in a sphere the radius of the sphere is 1. Then every point can be written in the form "r"v, where "r" is the distance from the point to the origin and v is a unit vector; moreover, for every point apart from the origin this representation is unique. Given such a representation of a point, its image under spherical inversion is defined to be the point "r"v. This defines a homeomorphism from formula_1 to itself. As a map from Euclidean space to itself, the spherical inversion map is not defined at the origin, but we can extend it to formula_2, the one-point