Jun 8, 2013 · Is there a macro in latex to write ceil(x) and floor(x) in short form? The long form \\left \\lceil{x}\\right \\rceil is a bit lengthy to type every time it is used.

Jan 25, 2012 · Is there a convenient way to typeset the floor or ceiling of a number, without needing to separately code the left and right parts? For example, is there some way to do $\\ceil{x}$ instead of $\\lce...

Oct 20, 2008 · Doesn't work for me. \DeclareUnicodeCharacter has no effect, whether it's in or not, the \dash command works. OTOH, if \DeclareRobustCommand is missing, \dash doesn't wor

Mar 20, 2013 · A LaTeX-y way to handle this issue would be to define a macro called, say, \floor, using the \DeclarePairedDelimiter device of the mathtools package. With such a setup, you can pass an optional explicit sizing instruction -- \Big and \bigg in the example code below -- or you can use the "starred" version of the macro -- \floor* -- to autosize ...

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Jan 8, 2011 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Long Answer: The Comprehensive LaTeX Symbol List is your friend. The correct link seems to keep changing, but if you have a complete TeX Live installation, the command texdoc symbols-a4 will display your local copy.

Apr 19, 2015 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

I'm getting this error: ! Undefined control sequence. l.64 ...p(- \\frac{E_j - E_i}{k_B T}) & \\quad \\text {: E_j > E_i}\\\\ ? ! Undefined co...

I generally prefer using the cases environment of the amsmath package for such cases (pun intended). However, it's also possible to achieve the result you're after by changing the MWE you provide fairly minimally -- mainly by changing \{to \left\{and adding a \right. instruction at the end of the array environment.