Maybe this signature
retractIfCan : % -> Union(AlgebraicNumber,"failed")
should support it, when % is EXPR COMPLEX INT.
- Qian
On 3/22/24 20:38, Ralf Hemmecke wrote:
Oh, for my case I have found a simple trick.
First map to Expression(Complex Intger) to Expression(AN) and then retract.
i := sqrt(-1)@AN;
za := map(x+->(real x + i*imag(x)), z)
Ralf
PS: Yes, Qian, your answer looks close.
On 3/22/24 13:22, Ralf Hemmecke wrote:
Suppose by some computation I get an expression like
z := (10*sqrt(163)+11*%i)/13/sqrt(105)
I would like to transform it into an element of AlgebraicNumber.
Unfortunately, up to now I was unable to find a function that helps to
to the retraction.
Does someone know a way for cases where I know that the input actually
can happily live in AN?
Thank you in advance.
Ralf
PS: That is one of the situations where things that look simple are
hard for users to actually perform.
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