Mon 2018-11-19 09:41:03 UTC+1, Simon King:
>
> If I recall correctly, there is a function that for *many* (not all)
> interactively created objects in Sage tells how they can be constructed,
> but I don't recall the name of that function.
That is sage_input, which can be used as follows:
sage: R.<x> = QQ[]
sage: sage_input(R)
QQ['x']
sage: sage_input(x)
R.<x> = QQ[]
x
Note that it does not always work:
sage: K = R.fraction_field()
sage: sage_input(K)
Traceback (most recent call last)
...
ValueError: Can't convert Fraction Field of Univariate Polynomial Ring
in x over Rational Field to sage_input form
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