# exponential integral

> special function defined by an integral

**Wikidata**: [Q1419948](https://www.wikidata.org/wiki/Q1419948)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Exponential_integral)  
**Source**: https://4ort.xyz/entity/exponential-integral


## References

1. Freebase Data Dumps. 2013
2. ISO 80000-2:2019 Quantities and units — Part 2: Mathematics
3. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)