OFFSET
1,2
COMMENTS
Unlike the fifteen theorem for universal quadratic forms (A030050), this theorem includes the number 13 arising from the case Q(sqrt(-39)).
LINKS
Byeong Moon Kim, Ji Young Kim, and Poo-Sung Park, The Fifteen Theorem for Universal Hermitian Lattices over Imaginary Quadratic Fields, Math. Comp. 79 (2010), 1123-1144.
CROSSREFS
KEYWORD
nonn,fini,full
AUTHOR
Ralf Steiner, Jan 29 2018
STATUS
approved