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
Hypercycle (geometry) the hypercycle. The segments of the normal between the "axis", and the hypercycle are called the "radii". Their common length is called the "distance" or "radius" of the hypercycle. The hypercycles through a given point that share a tangent through that point converge towards a horocycle as their distances go towards infinity. Hypercycles in hyperbolic geometry have some properties similar to those of lines in Euclidean geometry: Hypercycles in hyperbolic geometry have some properties similar to those of circles in Euclidean geometry: In the hyperbolic plane of constant curvature −1, the length of an arc of a hypercycle can be