I can't write Unicode characters in math mode. All current answers for this topic for other typsetting systems, not for pdfLaTeX.
I want to use Unicode in my formula. Even I used \usepackage[utf8]{inputenc}
, my code gives error:
\documentclass[11pt,a4paper,oneside]{article}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{graphicx}
\usepackage{tikz}
\usepackage{caption}
\usepackage{color}
\usepackage[colorlinks]{hyperref}
\usepackage{pgfplots}
\usepackage[utf8]{inputenc}
\begin{document}
Çıkış sıcaklığı
$$T_{çıkış}$$
\end{document}
T_{\text{çıkış}}