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I'm writing a file about algebraic topology, which means that I need all sorts of mathematical symbols, along with many various packages. I tried to use MnSymbol for its various arrows, only to find out that it is incompatible with amssymb and amsfonts.

Cutting out those two packages introduces new problems: \mathbb{..} doesn't work.

How is a mathematician supposed to use MnSymbol?

Currently, I am using the following packages: etex, babel, inputenc, fontenc, charter, MnSymbol, amsmath, ntheorem, framed, tikz, bookmark, hyperref, xy, mathtools, graphicx, animate, color, subfigure, caption, verbatim, multirow, longtable, wrapfig, cancel, enumitem, tocloft, geometry, stmaryrd, ulem, titlesec, fix-cm.

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MnSymbol is indeed imcompatible with amssymb and amsfonts. To use the AMS blackboard font in conjunction with MnSymbol, you can add the following to the preamble of your document:

\DeclareMathAlphabet\mathbb{U}{msb}{m}{n}

By the way, which symbol do you use from stmaryrd? If there is a similar symbol in MnSymbol, I would suggest to use that one for more consistency.

  • From stmaryrd, I'm using blackboard braces [...]. I see, that MnSymbol also includes them, so thanks for a good suggestion. – Leon May 4 '11 at 15:55
  • I have a REQUEST: I'm using $\ssearrow$ to denote a deformation retraction. I wanted to use the same arrow, but with two heads for a strong deformation retraction. It doesn't exist, even in MnSymbol. Would you be so kind to write me a command \newcommand{\twoheadssearrow}[0]{...}, which adds to \ssearrow another head. I would be really really grateful (I have no idea how to do it). Should I make a new thread for this? This is the only thing I was looking for in MnSymbol, and now I see it isn't included in the package. – Leon May 4 '11 at 16:01
  • You mean a double-headed version \sesearrow? Indeed, I think it is best if you pose a new question for this. – Michael Ummels May 4 '11 at 20:05

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