The TikZ-PGF manual is clear that for the matrix library, the delimiters are parentheses and braces:
Delimiters are parentheses or braces to the left and right of a formula or a matrix.
I would like to use brackets as delimiters for a matrix of math nodes. I have tried
\right] but they do not work.
Is there any way to get brackets as delimiters for a matrix of math nodes?