Does someone know a FriCAS function that returnss a from w?
If possible it should also work over Expression(X) in particular when
complex numbers are involved.
Of course, I could program something, but maybe it's already there and I
am just not able to find it.
Thank you
Ralf
(233) -> a := 1+sqrt(2)
+-+
(233) \|2 + 1
Type: AlgebraicNumber
(234) -> h := a^2
+-+
(234) 2 \|2 + 3
Type: AlgebraicNumber
(235) -> w := sqrt h
+----------+
| +-+
(235) \|2 \|2 + 3
Type: AlgebraicNumber
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