# Harnack's curve theorem

> number of connected components an algebraic curve can have

**Wikidata**: [Q5659675](https://www.wikidata.org/wiki/Q5659675)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Harnack's_curve_theorem)  
**Source**: https://4ort.xyz/entity/harnack-s-curve-theorem


## References

1. [Source](http://aleph0.clarku.edu/~djoyce/hilbert/problems.html#note35)