Four Heegner Numbers Long Sleeve Tee
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.A bit more formal than a standard-issue t-shirt, the ultra cotton long sleeve tee is a clear comfort winner. The sleeves also act as a nice frame. There are no side seams. The shoulders are taped for improved durability. This makes for a good fitting around the shoulders and neck. The cotton used for these shirts is environmentally friendly. .: 100% cotton (fiber content may vary for different colors).: Medium fabric (6.0 oz/yd² (203 g/m²)).: Classic fit.: Sewn-in label.: Runs smaller than usual