Opened 4 years ago
Last modified 2 months ago
#23015 new enhancement
Convert rootof function from giac
Reported by: | mforets | Owned by: | |
---|---|---|---|
Priority: | major | Milestone: | sage-9.4 |
Component: | symbolics | Keywords: | |
Cc: | rws, frederichan, slelievre | Merged in: | |
Authors: | Reviewers: | ||
Report Upstream: | N/A | Work issues: | |
Branch: | Commit: | ||
Dependencies: | #22024 | Stopgaps: |
Description (last modified by )
Provide a corresponding Sage function for Giac's rootof
. From the inline help of XCAS:
rootof(LstPoly(P),LstPoly(Q))
: Polynomial in terms of a root of an irreducible polynomial onQ
. ReturnsP(a)
witha
the greatest root ofQ
.
For example,
sage: giac.simplify((exp(2*i*pi/3)+exp(2*i*pi/15))^3) ((-768*i)*(-1)^(2/15)*sqrt(3)-768*(-1)^(2/15)+768*i*(-1)^(4/15)*sqrt(3)-768*(-1)^(4/15)+rootof([[16-16*i,-16+16*i,-400+528*i,144+240*i],[1,0,-30,-40,5]]))/512
This seems different from #22024.
Change History (6)
comment:1 Changed 3 years ago by
- Description modified (diff)
comment:2 Changed 3 years ago by
- Cc slelievre added
- Description modified (diff)
- Milestone changed from sage-8.0 to sage-8.4
comment:3 Changed 16 months ago by
comment:4 Changed 8 months ago by
- Milestone changed from sage-8.4 to sage-9.2
comment:5 Changed 6 months ago by
- Milestone changed from sage-9.2 to sage-9.3
comment:6 Changed 2 months ago by
- Milestone changed from sage-9.3 to sage-9.4
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fyi, This still shows up in 8.9