As noted in linked discussion, TeX (amsmath package) defaults to an arbitrary 10-column limit on matrices. There's a way to increase this with eg \setcounter{MaxMatrixCols}{36} but texvc doesn't pass it through to the validated output.

We could either increase the default to something more sensible (if there's no negative effects) or allow it to be set.

Version: unspecified
Severity: enhancement
URL: http://en.wikipedia.org/wiki/Help_talk:Displaying_a_formula?oldid=307353436#only_20_columns_in_matrixes