In solidarity with the people of France, and in support of human civilization, Trafalgar Square an hour ago.
Category theory takes a bird’s eye view of mathematics. From high in the sky, details become invisible, but we can spot patterns that were impossible to detect from ground level.
The opening sentences from Tom Leinster : Basic Category Theory. Cambridge University Press. Cambridge Studies in Advanced Mathematics.
A minimalist Nativity scene, by Emilie Voirin:
Yamba Surf Club was founded in 1908. The photo shows Tommy Walker surfing at Yamba around 1911. (Photo by O. B. Notley, from Manly Life Saving Club Australian Surfing Museum.) The post title is a reference to an O. Henry story.