# extended real number line

> extension of the reals by +∞ and −∞

**Wikidata**: [Q2039387](https://www.wikidata.org/wiki/Q2039387)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Extended_real_number_line)  
**Source**: https://4ort.xyz/entity/extended-real-number-line


## References

1. Freebase Data Dumps. 2013
2. KBpedia