Category theory [...]

According to Jim Holt in the New York Review of Books (reviewing Michael Harris, Mathematics without Apologies), category theory comes to us from the 1940s. The purpose of category theory is to explore the ways that often abstract qualities of likeness enable disparate mathematical objects to play together. Their resemblances (the example given is donuts and coffee cu...

 

Elegant In Themselves [...]

A Venn Diagram visually communicates how ideas overlap with shapes not words. A quote from John Venn, inventor of the graphic used to teach people about similarities: (source) We endeavor to employ only symmetrical figures, such as should not only be an aid to reasoning, through the sense of sight, but should also be to some extent elegant in themselves.~John Venn Ali...