View source for Acnode

An older term, hardly used nowadays (2000), for an isolated point, or hermit point, of a plane algebraic curve (cf. also [[Algebraic curve|Algebraic curve]]).

<img style="border:1px solid;" src="https://www.encyclopediaofmath.org/legacyimages/common_img/a130100a.gif" />

Figure: a130100a

For instance, the point <img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/a/a130/a130100/a1301001.png" /> is an acnode of the curve <img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/a/a130/a130100/a1301002.png" /> in <img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/a/a130/a130100/a1301003.png" />.

====References====
<table><TR><TD valign="top">[a1]</TD> <TD valign="top">  R.J. Walker,   "Algebraic curves" , Princeton Univ. Press  (1950)  (Reprint: Dover 1962)</TD></TR></table>