[pstricks] How to cope with the error message

[Herbert Voss]

Am 26.11.2016 um 20:06 schrieb cyrille.piatecki:
> I need help to understand why I have an error here even if the box and
> the maths are perfectly displayed
>
> Thanks
>
>
> \documentclass{article}
> \usepackage[T1]{fontenc}
> \usepackage{inputenc}
> \usepackage{pstricks, pstricks-add,pst-blur,pst-slpe}
> \usepackage{xcolor}
> \usepackage{amsmath}
> %\psset{algebraic}
>
> \begin{document}
>
> \begin{center}
> \psblurbox[fillstyle=slope,slopebegin=white,slopeend=gray,linestyle=none,shadow=true,blur=true]{%
>
> \[

this starts a paragraph box (vertical box), but it must be a horizontal
box. Use the \parbox command or the inline mathmode with \displaystyle:

\documentclass{article}
\usepackage[T1]{fontenc}
\usepackage{inputenc}
\usepackage{pstricks, pstricks-add,pst-blur,pst-slpe}
\usepackage{xcolor}
\usepackage{amsmath}
%\psset{algebraic}

\begin{document}
	
\begin{center}
\psblurbox[fillstyle=slope,slopebegin=white,slopeend=gray,linestyle=none,shadow=true,blur=true]{%
   $\displaystyle
   \left(C_0^\star, C_1^\star, C_2^\star\right)=
   \underset{\{C_0, C_1, C_2\}}{\max}
   \left\{U\left(C_0, C_1, C_2\right) \left|  W_0 =
   \sum_{t=0}^2\frac{R_t}{(1+r)^t}= 
\sum_{t=0}^2\frac{C_t}{(1+r)^t}\right.\right\}
	$}
\end{center}

\end{document}


Herbert