I have the following code
\documentclass{article}
\usepackage[spanish]{babel}
\usepackage[utf8]{inputenc}
\usepackage{gfsartemisia-euler}
\usepackage[T1]{fontenc}
\begin{document}
$$\lim_{t\to a}{f(t)}$$
\end{document}
and the result is
I found that removing \usepackage[spanish]{babel} the problem is solved, but I need to write in spanish and I like the font. are there some code like \usetikzlibrary{babel} which allows to use tikz and spanish together (\usetikzlibrary{babel} allows to use <-> in draws with spanish babel)

\unaccentedoperatorsafter thebabelpackage? – Manuel May 16 '15 at 14:26$$, see Why is\[ … \]preferable to$$? – egreg May 16 '15 at 14:50