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Just in time for Valentine's Day,the Guardian in London has reviewed and raved aboutThe Secret Language of Sleep.And, for the rest of the week, you can buy it for $5!
BY MARK AMUNDSEN
sextant
strip group
side-angle-side congruence
point of osculation
circle packing
Wang tiles
spherical excess
writhe number
homomorphism
squircle
Sierpinski sponge
circumellipse
annulus
self-dual configuration
screw rotation
head
ball
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