Abstract
We point out that the elliptic genus of the K3 surface has a natural decomposition in terms of dimensions of irreducible representations of the largest Mathieu group $M_{24}$. The reason remains a mystery.
Citation
Tohru Eguchi. Hirosi Ooguri. Yuji Tachikawa. "Notes on the K3 Surface and the Mathieu Group M24." Experiment. Math. 20 (1) 91 - 96, 2011.
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