Subgroup structure of projective special linear group:PSL(2,11)

This article discusses the subgroup structure of projective special linear group:PSL(2,11), which is the projective special linear group of degree two over field:F11. The group has order 660, with prime factorization:

$$660 = 2^2 \cdot 3^1 \cdot 5^1 \cdot 11^1 = 4 \cdot 3 \cdot 5 \cdot 11$$