Four Heegner Numbers Unisex 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. Produced and delivered within 2-3 business days with express delivery option (US only - navy and black colors only). The unisex heavy cotton tee is the basic staple of any wardrobe. The specially spun fibers provide a smooth surface for premium printing vividity and sharpness. No side seams mean there are no itchy interruptions under the arms. The shoulders have tape for improved durability. .: Made with medium fabric (5.3 oz/yd² (180 g/m²)) consisting of 100% cotton for year-round comfort that is sustainable and highly durable. .: The classic