*Escher’s “Circle Limit III”* Continue reading

# Tag Archives: Geometry

# Why the determinant ad-bc measures expansion of areas

# “A picture is worth a thousand equations”

# Geometry and “crap”

# The proof of the Morley miracle: an example to learn from on how to do maths

# Complex loci: circle-plus ↔ circle-plus

Linear transformations in two dimensions are defined by transforming lines into lines. If we look at things more in a polar-coordinates, complex-numbers way, we find another set of transformations which transform shapes of a particular simple sort into shapes of the same sort. Continue reading