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There are at least three options:
- "one over"
- unary division with "tilda" in prefix notation
- the
inverse_of_unitmethod of ring elements
Illustration:
sage: K = GF(7)
sage: a = K(5)
sage: 1 / a
3
sage: K.one() / a
3
sage: ~a
3
sage: sage: a.inverse_of_unit()
3
In many other settings, objects that can be inverted
also have a method called inverse.
That is however not the case here:
sage: a.inverse()
Traceback (most recent call last)
...
AttributeError: 'sage.rings.finite_rings.integer_mod.IntegerMod_int'
object has no attribute 'inverse'
Maybe such a method could be added for finite field elements.
