I am trying to prove that
$$Out(SL_{2}(\mathbb{F}_{p})) \cong \mathbb{Z}_{2}$$
for $p$ prime, but I have no clue where I should start, can anyone help me?
2026-03-28 12:02:43.1774699363
Outer automorphism group of $SL_2(\mathbb{F_{p}})$
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