# Acnode

From Encyclopedia of Mathematics

An older term, hardly used nowadays (2000), for an isolated point, or hermit point, of a plane algebraic curve.

For instance, the point $(0,0)$ is an acnode of the curve $X^3+X^2+Y^2=0$ in $\RR^2$.

#### References

- [a1] R.J. Walker, "Algebraic curves",
*Princeton Univ. Press*(1950) (Reprint:*Dover*1962)

**How to Cite This Entry:**

Acnode.

*Encyclopedia of Mathematics.*URL: http://encyclopediaofmath.org/index.php?title=Acnode&oldid=52716

This article was adapted from an original article by M. Hazewinkel (originator), which appeared in Encyclopedia of Mathematics - ISBN 1402006098. See original article