One stroke BOOKS,SCIENCE AND STUDY,SCIENT AND POPULAR Title: One stroke. Drawing figures with one continuous line Author: I. and . Perelman . Publisher: Leningrad Year of publication: 1940 Pages: 16 Format: DJVU Size: 1.2 MB Quality: Good, 600 dpi, cover art and illustrations The problem of the Knigsberg bridges. The attention of the brilliant mathematician Euler was once attracted by a peculiar problem, which he expressed in this form: “In Knigsberg there is an island called Kneipphof .. The river that passes it is divided into two sleeves (see .). rice. ), over which seven bridges are thrown: a, b, c, d, e, f, y. "Is it possible to bypass all bridges without having visited any of them more than once?"Some argue that it is possible. Others, on the contrary, find such a requirement unfeasible.". What is your opinion, reader? 51 1 2 3 4 5