### Navigation

- index
- modules |
- modules |
- next |
- previous |
- SciPy v0.12 Reference Guide (DRAFT) »
- Special functions (`scipy.special`) »

# scipy.special.expi

`scipy.special.``expi`(x[, out]) = <ufunc 'expi'>

  y=expi(x) returns an exponential integral of argument x defined as integral(exp(t)/t,t=-inf..x). See expn for a different exponential integral.

### Navigation

- index
- modules |
- modules |
- next |
- previous |
- SciPy v0.12 Reference Guide (DRAFT) »
- Special functions (`scipy.special`) »