MAA Found Math - Week 36

MAA FOUND MATH: Karen Saxe (MAA Vice President-elect) snapped this photo of an old foundry in the Warehouse District in Minneapolis. Commutator is a term in group theory, or it may refer to the moving part of a rotary electrical switch.

See math in the world around you? Send your photos to editor@maa.org.

Watch a slideshow of MAA Found Math