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IsIrred    --    check if a RINGELEM is irreducible


Syntax
IsIrred(f: RINGELEM): BOOL

Description
This function tests whether the argument f is irreducible in RingOf(f) . The coefficient ring must be a field.

Example
/**/ FFp := NewZZmod(7);
/**/ use FFp[x];
/**/ f := x^9+x+1;
/**/ IsIrred(f);
true