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[parent] Viewing Message
``even better...'' by drini on 2001-08-20 21:40:26
$p$ is a prime
IF AND ONLY IF
$(p-1)!\equiv -1\pmod{p}$

now tell me, isn't that great?
 f 
G ---------> H 
 \ ^ G 
p \ /_ ----- ~ f(G)
 \ / f ker f 
 Y / 
 G/ker f 
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