1 | | People need to manipulate statistical distribution functions as in https://ask.sagemath.org/question/35407/use-cumulative-distribution-functions/ |
2 | | To provide the means a symbolical version of `erfc` is necessary. The current `error_fcn()` is only numerical. |
| 1 | This ticket should accomplish: |
| 2 | * implement inverse error function `inverf` (#11349) |
| 3 | * implement imaginary error function `erfi`. |
| 4 | * People need to manipulate statistical distribution functions as in https://ask.sagemath.org/question/35407/use-cumulative-distribution-functions/. To provide the means a symbolical version of `erfc` is necessary. The current `error_fcn()` is only numerical. |
| 5 | * make them all `GinacFunction`s |
| 6 | * put it all in a separate file `functions/error.py` with central documentation |
| 7 | |
| 8 | http://dlmf.nist.gov/7 |