The crossing number of K 11 is 100
Shengjun Pan, R. Bruce Richter · Journal of Graph Theory · 2007
Abstract The crossing number of K n is known for n ⩽ 10. We develop several simple counting properties that we shall exploit in showing by computer that cr ( K 11 = 100, which implies that cr ( K 12 ) = 150. We also determine the numbers of non‐isomorphic optimal drawings of K 9 and K 10 . © 2007 Wiley Periodicals, Inc. J Graph Theory 56: 128–134, 2007