Opened 7 years ago
Last modified 5 years ago
#13050 new enhancement
allow different algorithms for evaluating erf
Reported by: | benjaminfjones | Owned by: | burcin |
---|---|---|---|
Priority: | minor | Milestone: | sage-6.4 |
Component: | symbolics | Keywords: | sd40.5 mpmath pari erf |
Cc: | dsm, kcrisman | Merged in: | |
Authors: | Benjamin Jones | Reviewers: | |
Report Upstream: | N/A | Work issues: | |
Branch: | Commit: | ||
Dependencies: | #12289 | Stopgaps: |
Description (last modified by )
In #1173 an mpmath numerical evaluator for erf
was written by Douglas McNeil. This ticket proposes to save that code, incorporate it with the ability to pass an algorithm
parameter to numerical_approx
from #12289. We could support Pari, mpmath, and Maxima.
It would even be useful to see where Pari is faster.
Attachments (1)
Change History (10)
Changed 7 years ago by
comment:1 Changed 7 years ago by
- Dependencies changed from 12289 to #12289
comment:2 Changed 7 years ago by
comment:3 follow-up: ↓ 4 Changed 7 years ago by
This looks like a duplicate of #1173 to me.
comment:4 in reply to: ↑ 3 Changed 7 years ago by
comment:5 Changed 6 years ago by
- Description modified (diff)
- Summary changed from change default numerical evaluation of `erf` to use mpmath to allow different algorithms for evaluating erf
I think that we can repurpose this ticket to adding the algorithm keyword here. Some good examples from #1173 (most were added in #13001):
Verify we're returning the appropriate zero:: sage: erf(0) 0 sage: erf(0.0) 0.000000000000000 sage: erf(RealField(100)(0)) 0.00000000000000000000000000000
set(erf(45*10**i).n() for i in range(10))
sage: CC(erf(ComplexField(1000)(2+3j)))
comment:6 Changed 6 years ago by
- Milestone changed from sage-5.11 to sage-5.12
comment:7 Changed 5 years ago by
- Milestone changed from sage-6.1 to sage-6.2
comment:8 Changed 5 years ago by
- Milestone changed from sage-6.2 to sage-6.3
comment:9 Changed 5 years ago by
- Milestone changed from sage-6.3 to sage-6.4
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add mpmath evaluation to erf