[Tex/LaTex] missing symbols in mathmode

math-mode

I'm trying to insert a couple of numbered equations into a latex document, the equation is very basic yet all the normal operators =, + and – don't appear when I compile the document. I commented everything out except for the equation and still get the same output so I don't think it is as a result of anything before it in the document. This is the first document I'm writing using latex so chances are its something really basic!!
the two equations are

\begin{equation} 
Z = \frac{c_o - 4c_p}{c_{Si} + Rc_M } - 2
\end{equation}

and

\begin{equation} 
NC = 4 - 2Z
\end{equation}

This is the header to the document

\usepackage{baththesis}
\usepackage[small,it]{caption}
\usepackage[usenames, dvipsnames]{xcolor}
\usepackage[a4paper, top=2.5cm, bottom=2.5cm, left=4cm, right=2.5cm,includeheadfoot,head=3cm, headsep=6ex, headheight=4ex]{geometry} % setting page to A4
\usepackage[sort&compress]{natbib}
\usepackage{multirow, array, textcomp, placeins, rotating, amsmath, amsthm, amssymb, acronym, graphicx, subfig, setspace}
\usepackage{isotope}% package for isotopes [#]{element}
\usepackage{fouriernc}
\usepackage{txfonts}
\usepackage[version=3]{mhchem} %package for checmical compositions ce{composition}

Best Answer

Loading both fouriernc and txfonts doesn't make sense. Use only either one of them.

If you prefer Times to New Century Schoolbook, then try

\usepackage{newtxtext,newtxmath}

instead of

\usepackage{txfonts}

The newtx packages solve the spacing problems of the original TX fonts.

Related Solutions

[Tex/LaTex] Merging Symbols in Mathmode

A simple solution for single characters in the box and diamond. Play around with the setting \setlength\fboxsep{2pt} inside macros

\documentclass[a5paper,12pt]{article}
\usepackage{amssymb,graphicx}
\def\CBox#1{\fbox{$\scriptstyle#1$}}
\def\DBox#1{\rotatebox[origin=c]{45}{\fbox{\rotatebox[origin=c]{-45}{$#1$}}}}
\begin{document}

$\CBox{a}$
$\DBox{a}$

\end{document}

enter image description here

[Tex/LaTex] Are mathmode symbols usable within tikz arrays

The problem is not with math. Math is perfectly OK, you can for example replace w by "$w$" (double quotes are mandatory around the dollar signs).

The problem is with math accents, as for example \ddot in your sample code. The problem appears because TeX expands \ddot{\ldots} into:

"$\mathaccent "707F\relax {\mathinner{\cdotp \cdotp \cdotp }}$"

You can see there the string "707F being " the escape used by TeX to prefix hexadecimal numbers. In this case this " causes trouble to the pgfmath parser, which considers that double quote the end of the string, and thus the following 7 is an unexpected token.

The problem can be easily solved by wrapping the whole math expresion into an aditional pair of braces: "{$\ddot{\ldots}$}" as the following MWE shows:

\documentclass{article}
\usepackage{tikz}
\begin{document}
% Tikz
\usetikzlibrary{positioning, shapes, calc}
%
\pagestyle{plain}
%
\begin{figure}
    \begin{tikzpicture}[scale=1.0]
    \def\mysymbols{{"$\approx$", "{$\ddot{\cdots}$}", "$\Upsilon$", "$\approx$"}}
    %Array with indices
    \def\myindices{{{0,1,0},{0,1,0},{2,2,0},{0,2,1}}}
    %
    \foreach \x in {0,...,2}{
        \foreach \y in {0,...,2}{
            %get symbol
            \pgfmathparse{\mysymbols[\myindices[\y][\x]]}
            %put a node at x,y with the symbol as the label
            \node[] at ($(\x,\y)$) {\pgfmathresult};
        }
    }
    \end{tikzpicture}
    %
\end{figure}
\end{document}

Best Answer

Related Solutions

[Tex/LaTex] Merging Symbols in Mathmode

[Tex/LaTex] Are mathmode symbols usable within tikz arrays

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