Four Heegner Numbers Unisex Hoodie
A Heegner number is a square-free positive integer d such that the ring of algebraic integers of the rationals adjoined square root negative d has unique factorization. There are nine Heegner numbers: 1, 2, 3, 7, 11, 19, 43, 67, and 163. There are many apparent mathematical coincidences involving Heegner numbers that can be explained by complex multiplication and the q-expansion of the j-invariant. That is a lot of jargon - just enjoy the shirt. This unisex heavy blend hooded sweatshirt is relaxation itself. Made with a thick blend of cotton and polyester, it feels plush, soft and warm, a perfect choice for any cold day. In the front, the spacious kangaroo pocket adds daily practicality while the hood's drawstring is the same color as the base sweater for extra style points. .: Made with a medium-heavy fabric (8.0 oz/yd² (271 g/m²)) that consists of 50% cotton and 50% polyester for that cozy feel and warmth you need in a hoodie..: The classic fit along with the pouch pocket and the te