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Answer by egreg for don't understand a particular error message I'm getting
The problem is that the first [ follows \\ and is mistaken for introducing the optional argument. Use \relax or, better, use the proper...
View ArticleAnswer by David Carlisle for don't understand a particular error message I'm...
the [is being seen as an optional argument, which takes a length, \\[5pt] so use....\\ \relax[....]to hide the [ from \\ Note $$ and\hskip are TeX primitives that should not be used in LaTeX, use \[...
View Articledon't understand a particular error message I'm getting
When I type$$ A_n\ =\ \left\{\begin{array}{ccc}[\hskip.017in 0,1\hskip.017in] & {} & n\ {\rm is\ even} \\[\hskip.017in -1,0\hskip.017in] & {} & n\ {\rm is\ odd} \\\end{array}\right.\ ,...
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