All posts by Chris

The Shape of Things

Folks have been trying to figure out the shape of the universe for a long time. Early answers included “a big tree” and “flat, supported by elephants on the back of a turtle”. One of the latest ideas is a Picard topology, sort of a horn shape with a really long end.

I notice that the term “pringle” has replaced “saddle” when describing areas of negative curvature…

An Exercise

This probably won’t make sense to anyone else, but I need to make a note reminding myself about something I thought about over lunch. (I always lose them otherwise, so maybe this will help me remember.) Read on if that kind of thing interests you.
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