[Tex/LaTex] textit – undefined control sequence

amsmath

I got a problem using \textit{}`. The error which occurs is

"Undefined control sequence".

It occurs in a formula.

\texitit{P}_{int} = \int_{V^r} \textbf{\textit{P}}^{i+1} : \dot{\textbf{\textit{F}}}^{i+1} dV^r .

How can I solve this problem?

Best Answer

Your first P has a \texitit rather than \textit. Notice the extra i?

Related Solutions

[Tex/LaTex] Can’t use some AMS binary operators

The command \nsim is listed in table 69 of the Comprehensive LaTeX Symbol List, under the caption

AMS Negated Binary Relations

In section 1.1 of the document, we find

“AMS” means to use the AMS packages, viz. amssymb and/or amsmath.

Actually most of the symbols with that tag require amssymb and this is the case for \nsim.

enter image description here

Note that the result of \not\sim is rather different, so the final answer is

\documentclass{article}
\usepackage{amssymb}

\begin{document}
... bla bla bla $a \nsim b$ bla bls ...

\end{document}

[Tex/LaTex] Math in a table

This should work. Please avoid \bf in favor of \textbf{...}.

\documentclass{article}
\pagestyle{empty}% for cropping
\begin{document}
\begin{tabular}{| p{3cm} | p{9cm} }
\hline
\textbf{hardware} & \textbf{rekensom} \\
\hline
6506E & $1 - (1 - 0.9999909)^2 = 0.99999999991 * 100\% = 99.9999999917\%$ \\
\hline
6509E & $1 - (1 - 0.9999885)^2 = 0.99999999986 * 100\% = 99.9999999868\%$ \\
\hline
\end {tabular}
\end{document}

Here, have a slightly enhanced version:

\documentclass{article}
\pagestyle{empty}% for cropping
\usepackage{amsmath,booktabs}
\begin{document}
\begin{tabular}{lp{0.7\linewidth}}
    \toprule
    Hardware & Rekensom \cr
    \midrule
    6506E &
    $\aligned
        1 - (1 - 0.9999909)^2 &= 0.99999999991 \cdot 100\,\% \\
        &= 99.9999999917\,\%
    \endaligned$ \cr
    6509E &
    $\aligned
        1 - (1 - 0.9999885)^2 &= 0.99999999986 \cdot 100\,\% \\
        &= 99.9999999868\,\%
    \endaligned$ \cr
    \bottomrule
\end {tabular}
\end{document}

Best Answer

Related Solutions

[Tex/LaTex] Can’t use some AMS binary operators

[Tex/LaTex] Math in a table

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