Belyi map for the sporadic group J1
arXiv:1704.06419
Abstract
We compute the genus 0 Belyi map for the sporadic Janko group J1 of degree 266 and describe the applied method. This yields explicit polynomials having J1 as a Galois group over K(t), [K:Q] = 7.
5 pages, the data for the Belyi map is contained in an ancillary file