[Tex/LaTex] Creating a \precneq symbol

amsmathsymbols

Going through the comprehensive symbols list, and also Detexify, we see that through various packages (mostly amssymb) we can get the symbols

  • \prec Precedes. Unicode U+227A: ≺
  • \preceq Precedes or equals to. Unicode U+227C: ≼
  • \precsim Precedes or equivalent to. Unicode U+227E: ≾
  • \precnsim Precedes and not equivalent to. (I don't think there is a unicode symbol for this one) Edit: as David Carlisle points out I just didn't scroll down far enough. It is Unicode U+22E8.

Its cousin < supports variants \leq and \lneq. Evidently, however, there is no \precneq equivalent for the "precedes" symbol.

Question: Has someone already constructed the symbol and placed it in a package? If not, how can I construct such a symbol? It should start from the AMS \preceq symbol and drop a cancelling sign over the equals-to part only.

Edit: for clarification, something like the following is what I desire:

enter image description here

Best Answer

Lost symbol sighted in mathabx. :)

\documentclass{article}
\usepackage{mathabx}
\begin{document}
$\precneq$
\end{document}

enter image description here

EDIT: A nice resource in such cases, the Comprehensive Symbol List. I admit, at times it can be quite tedious browsing it for a given symbol... but so far it's the best thing I know of.