Lobster = Tree
(The first words I heard at the Boca graph theory conference in 2005 were part of Alex Rosa’s keynote: “What is a lobster? [dramatic pause] A lobster is a tree.”)
Brown Sharpie
Mathematical Cartoons inspired by Sharpie Fumes
(The first words I heard at the Boca graph theory conference in 2005 were part of Alex Rosa’s keynote: “What is a lobster? [dramatic pause] A lobster is a tree.”)
A lobster is a tree that becomes a caterpillar when leaves are removed. Centipedes, stars and paths are lobsters, most firecrackers and banana trees aren’t.