In this code, [c\mathbf{v}+c'\mathbf{v}',\mathbf{w}] is not shown in the equation. Is it because of the aligned environment? How to fix it?

  • As a comment, I found both \begin{aligned}{} and `\begin{aligned}\` work. Thanks all. – eccstartup Dec 9 '15 at 0:38

What you're experiencing is the fact that the aligned environment -- as set up by the amsmath package -- is set to scan ahead for a positioning argument such as [t] or [b]. Material that's found in square brackets but which doesn't meet this format is simply discarded.

I can think of two solutions:

  • Insert \relax before the left square bracket (it will stop the bracket from being interpreted as an argument);

  • Insert {} (an empty math atom) before the left square bracket;

  • Load the mathtools package instead of the amsmath package, as the former takes care to disable this generally-unexpected-and-unwelcome setting.

A separate matter: To get the correct (and symmetric) amount of spacing around the = symbols, you should write &= rather than =&.

  • 1
    Or use \lbrack instead of [ when at the start of a line. – egreg Feb 19 '16 at 21:44

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.