Opened 3 years ago

Last modified 3 months ago

#28390 new defect

Taylor series should raise an error if derivative not defined.

Reported by: klui Owned by:
Priority: minor Milestone: sage-9.7
Component: calculus Keywords: taylor series polynomial
Cc: Merged in:
Authors: Reviewers:
Report Upstream: N/A Work issues:
Branch: Commit:
Dependencies: Stopgaps:

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Description (last modified by klui)

I think an error should be raised in the following example:

sage: f(x) = x**(1/3); f
x |--> x^(1/3)
sage: f.taylor(x,0,3)
x |--> x^(1/3)

Change History (9)

comment:1 follow-up: Changed 3 years ago by kcrisman

I'm not familiar with this notation for Taylor polynomials (which is surprising) but anyway to make it clear:

f.taylor(x,0,3)
x |--> x^(1/3)

For what it's worth, f.series(x,3) gives an error.

comment:2 in reply to: ↑ 1 Changed 3 years ago by klui

  • Description modified (diff)

Replying to kcrisman:

I'm not familiar with this notation for Taylor polynomials (which is surprising) but anyway to make it clear:

f.taylor(x,0,3)
x |--> x^(1/3)

For what it's worth, f.series(x,3) gives an error.

Version 0, edited 3 years ago by klui (next)

comment:3 Changed 3 years ago by embray

  • Milestone changed from sage-8.9 to sage-9.1

Ticket retargeted after milestone closed

comment:4 Changed 2 years ago by mkoeppe

  • Milestone changed from sage-9.1 to sage-9.2

Moving tickets to milestone sage-9.2 based on a review of last modification date, branch status, and severity.

comment:5 Changed 22 months ago by mkoeppe

  • Milestone changed from sage-9.2 to sage-9.3

comment:6 Changed 15 months ago by mkoeppe

  • Milestone changed from sage-9.3 to sage-9.4

Moving to 9.4, as 9.3 has been released.

comment:7 Changed 12 months ago by mkoeppe

  • Milestone changed from sage-9.4 to sage-9.5

comment:8 Changed 8 months ago by mkoeppe

  • Milestone changed from sage-9.5 to sage-9.6

comment:9 Changed 3 months ago by mkoeppe

  • Milestone changed from sage-9.6 to sage-9.7
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