For the math geeks -

Jack and the Acktuals, or, Physical Applications of Transfinite Set Theory  by Rudy Rucker.

When Jack talked about the alefs, she saw the symbols instead of hearing the words. ℵ0, ℵ1, ℵ2, ℵ3, and ℵk. She also remembered that Jack liked to use his crazy numbers as exponents, like 2ℵ0, 2ℵ1, 2ℵ2, 2ℵ3, and 2ℵk. Whatever that meant ( Read more... )