LaTeX Warning: There were multiply-defined labels. LaTeX Warning: There were undefined references. LaTeX Warning: You have requested release `. LaTeX/Mathematics. From Wikibooks, open books for an open world LaTeX has defined two commands that can be used anywhere in documents (not just maths). TeX - LaTeX help chat. TeX - LaTeX Meta your communities. Sign up or log in to customize your list. more What does 'Label multiply defined' mean?