Opened 3 years ago

Last modified 3 years ago

## #22138 new defect

# Wrong Maxima integral result for even exponents — at Initial Version

Reported by: | paulmasson | Owned by: | |
---|---|---|---|

Priority: | major | Milestone: | sage-7.6 |

Component: | symbolics | Keywords: | |

Cc: | Merged in: | ||

Authors: | Reviewers: | ||

Report Upstream: | Not yet reported upstream; Will do shortly. | Work issues: | |

Branch: | Commit: | ||

Dependencies: | Stopgaps: |

### Description

The commands

var('n') assume(n,'integer') integral(x^n*sin(x),x)

produce the output

1/4*(((-1)^n - 1)*gamma(n + 1, I*x) - ((-1)^n - 1)*gamma(n + 1, -I*x))*(-1)^(-1/2*n)

which is identically zero for `n`

even. Possibly an issue with branches of exponential integrals. Possibly related to #17968.

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