女生小视频

Polyhedra, by Peter Cromwell, is not going to be a wildly popular book,
though it is about things we see everyday in nature, art, buildings鈥攅ven
in the world鈥檚 most popular sport where a football is a polyhedron. As objects,
the beauty of polyhedra can be striking, as a glance at the colour plates
reveals. Their history, from ancient Greece and Egypt on, involves theories of
space and light, geometry, astronomy, the invention of artificial perspective
and, of course, mathematics. Nonmathematicians will still find plenty to
fascinate. Published by CUP, 拢30, ISBN 0521554322.