mathpazo and pxfonts: equal sign and \neq look different

consider the following (minimal) example:

\documentclass{article}
\usepackage[T1]{fontenc}
\usepackage[sc,osf]{mathpazo}
\usepackage{pxfonts}
\begin{document}
$=$ $\ne$
\end{document}


Is there any way I can make the "not equal" sign look exactly like a struck equal sign? Currently it does not.

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You should load either the mathpazo package or the pxfonts package, but not both. As you've noticed, the math symbols provided by these two packages are not identical, and little good is going to come from (deliberately or inadvertently) mixing and (mis)matching them. –  Mico Jun 25 '12 at 13:14
Owh, alright. Do you know the correct way to get symbols like \blacksquare when using mathpazo? –  Jesko Hüttenhain Jun 25 '12 at 13:17
Yes: Issue the commands \usepackage{amsfonts} and \DeclareMathSymbol{\blacksquare}{\mathord}{AMSa}{4}. That's how the pxfonts package sets up the "black square" symbol; no reason to do it differently for mathpazo, right? :-) –  Mico Jun 25 '12 at 13:27
Alright, thanks =D –  Jesko Hüttenhain Jun 25 '12 at 14:25

You should load either the mathpazo package or the pxfonts package, but not both. As you've noticed, the math symbols provided by these two packages are not identical, and little good is going to come from (deliberately or inadvertently) mixing and (mis)matching them.
In a comment, you note that you need access to commands such as \blacksquare, which are set up by default in pxfonts but not in mathpazo. What to do if you decide to use the mathpazo package but need access to these additional commands? The definitions of these additional commands are provided in the file pxfonts.sty, and it shouldn't be too difficult to copy-and-paste the macros to your document's preamble. For instance, to get the \blacksquare command set up, you'd type the following in your preamble:
\usepackage{amsfonts}