Before then, the only legal union was between man and woman.

Set theory.

Several years ago, a group of artistic polymaths decided to mathematically represent different styles of painting.

Each of the polymaths was a leading figure in a different field of mathematics, and each pursued and studied a different style of painting. Together, they decided that if they co...

Each of the polymaths was a leading figure in a different field of mathematics, and each pursued and studied a different style of painting. Together, they decided that if they co...

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