Math & Science ⇒ Using equation inside "itemize"

[fifinho]

Dear All..

I would like to know if anybody can help me with this problem. How can i put af number on af formula while the formula is "inside" itemize. I have the following code:

Code: Select all

\begin{itemize}
\item $k(t) = \sqrt{\frac{\pi \cdot \rho \cdot c_{p}}{750 \cdot \lambda \cdot t}}$
\item $\theta_{1}$ er temperaturen, og kan ikke ikke regnes mindre en 20 $\degreeC$  [${0}^C$]
\item x er afstanden fra overfladen på den brandeksponeret side [m]
\item t er tiden. [min]
\end{itemize}

I want the formula k(t) to have a number like all other equations in my document.

Hoping somebody know.

[yoyoimut]

Actually I don't understand well what your need is.
It might be what you want.

Code: Select all

\documentclass{article}
\usepackage{array}
\usepackage{pifont}
\begin{document}
\newcolumntype{C}{@{}>{\ding{232}}r@{}}
\newcolumntype{M}{>{\begin{equation}}m{7cm}<{\end{equation}}}
\begin{tabular}{CM} 
& \sin x \\
& \cos x \\
& \int_a^b f(x)\, dx = F(b) - F(a) \\
\end{tabular}
\end{document}

Thanks.

[josephwright]

I'm really not sure what you want. The following is a slightly tidied-up version of your original. Please modify if to show the problem/effect.

Code: Select all

\documentclass{article}
\usepackage{siunitx}
\begin{document}
\begin{itemize}
  \item $k(t) = \sqrt{\frac{\pi \rho c_{\text{p}}}{750 \lambda t}}$
\item $\theta_{1}$ er temperaturen, 
  og kan ikke ikke regnes mindre en \SI{20}{\degreeCelsius}  
    [\si{\degreeCelsius}]
\item $x$ er afstanden fra overfladen p{\aa} den brandeksponeret side 
  [\si{\metre}]
\item $t$ er tiden [\si{\minute}]
\end{itemize}
\end{document}

[Juanjo]

Try the following code, which includes the improvements by josephwright:

Code: Select all

\documentclass{article}
\usepackage{siunitx,amsmath}

\newcommand{\itemEq}[1]{%
        \begingroup%
        \setlength{\abovedisplayskip}{0pt}%
        \setlength{\belowdisplayskip}{0pt}%
        \parbox[c]{\linewidth}{\begin{flalign}#1&&\end{flalign}}%
        \endgroup}

\begin{document}
\begin{itemize}
  \item Some text here
  \item \itemEq{a+b+c=d+e}

  \item \itemEq{k(t) = \sqrt{\frac{\pi \rho c_{\text{p}}}{750 \lambda t}}}

  \item $\theta_{1}$ er temperaturen, og kan ikke ikke regnes mindre en 
        \SI{20}{\degreeCelsius} [\si{\degreeCelsius}]
  \item $x$ er afstanden fra overfladen p{\aa} den brandeksponeret side
        [\si{\metre}]
  \item $t$ er tiden [\si{\minute}]
\end{itemize}
\end{document}

[fifinho]

Thanks for the great answers. Normally when you write a equation in latex it looks like this:

\begin{equation}
\frac{a}{b}+c
\end{equation}

the out becomes:

a/b + c ------------------------(1)

so the formula is displayed and "equation number" is added as well. I can choose to remove the equation number my adding * like this:

\begin{equation*}
\frac{a}{b}+c
\end{equation*}


That was what i meant.. i already knew the answer so stupid to ask. But thanks anyways.

Have a nice holiday..

[vickie]

Dear Juanjo,

If I use your commands, is there a way I could remove the equation numbers please?

Thanks

[Juanjo]

If you don't want equation numbers, just don't use the \itemEq command defined in my previous post and write directly in math mode. Alternatively, if you have used \itemEq several times and you want to remove the number in a particular item, you can add \notag at the end (i.e. \itemEq{some math here\notag}).

[vickie]

Thanks a lot! seems to have worked! I had a slightly different situation with an array in itemization and spent so much time trying to get what I wanted! Thanks again!