1

I tried a lot but unable to solve this equation.

\documentclass{article}
\usepackage{booktabs}
\usepackage{multirow}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\begin{document}

\begin{equation}
 f\left\( x,y,\omega,\theta,\sigma x,\sigma y \right)=\frac{1}{2\pi\sigma x,\sigma y} exp\left\[\frac{-1}{2}\right\left(\left(\frac{x}{\sigma x}\right)^{2}\right)\left+\left(\left(\frac{y}{\sigma y}\right)^{2}\right)+j\omega\left(x \cos\theta + y \sin\theta\right)\right]
\end{equation}

\end{document}

always showing

!Missing delimitter (.inserted).

  • Welcome to TeX.SX! It's always better to provide a full example, with a \documentclass{}, the relevant packages and \begin{document}...\end{document} pair. – user31729 Nov 25 '14 at 5:47
  • \left\( is wrong, it's \left(... ... oh, Harish already provided a solution – user31729 Nov 25 '14 at 5:49
0

Here is how I would typeset the equation:

\documentclass{article}

\begin{document}

\begin{equation}
  f(x,y,\omega,\theta,\sigma x,\sigma y)
  = \frac{e^{-1/2}}{2\pi\,\sigma x,\sigma y}
    \Bigl(\frac{x}{\sigma x}\Bigr)^{\mkern -2mu 2}
    \left[+\Bigl(\frac{y}{\sigma y}\Bigr)^{\mkern -2mu 2}
          + j\omega(x\cos\theta + y\sin\theta)\right]
\end{equation}

\end{document}

output1

or

\documentclass{article}

\begin{document}

\begin{equation}
  f(x,y,\omega,\theta,\sigma x,\sigma y)
  = \frac{\exp(-1/2)}{2\pi\,\sigma x,\sigma y}
    \Bigl(\frac{x}{\sigma x}\Bigr)^{\mkern -2mu 2}
    \left[+\Bigl(\frac{y}{\sigma y}\Bigr)^{\mkern -2mu 2}
          + j\omega(x\cos\theta + y\sin\theta)\right]
\end{equation}

\end{document}

output2

Notice that with either approach you only need a single line.

2

You have used \left\( and \left\[ which should be \left( and \left[.

\documentclass{article}
\usepackage{amsmath}
\begin{document}
  \begin{equation}
 f\left( x,y,\omega,\theta,\sigma x,\sigma y \right)=\frac{1}{2\pi\sigma x,\sigma y} \exp\left[\frac{-1}{2}\right]\left(\left(\frac{x}{\sigma x}\right)^{2}\right)\left[+\left(\left(\frac{y}{\sigma y}\right)^{2}\right)+j\omega\left(x \cos\theta + y \sin\theta\right)\right]
\end{equation}
\end{document}

enter image description here

This looks better

\documentclass{article}
\usepackage{amsmath}
\begin{document}
  \begin{equation}
  \begin{split}
 f\bigl( x,y,\omega,\theta,\sigma x,\sigma y \bigr)&=\frac{1}{2\pi\sigma x,\sigma y} \exp\biggl[\frac{-1}{2}\biggr]\\
&\qquad\Bigl(\frac{x}{\sigma x}\Bigr)^{2}\Bigl[+\Bigl(\frac{y}{\sigma y}\Bigr)^{2}+j\omega\bigl(x \cos\theta + y \sin\theta\bigr)\Bigr]
\end{split}
\end{equation}
\end{document}

enter image description here

  • @ Harish Kumar: you forgot the backslashin front of exp. – Bernard Nov 25 '14 at 11:06
  • @HarishKumar -- unless i'm hallucinating, the two pairs of \left delimiters in your first sentence are the same, so i am confused. i did spot a \left+ in the original. – barbara beeton Nov 25 '14 at 16:02
  • @barbarabeeton I was confused too thinking what that \left+ is doing there? I was uncertain of what to put and there is also a redundant + in the equation. So I am not sure of what the equation is. It is a mess IMO. :-) – user11232 Nov 25 '14 at 22:56

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