Reply To: Matrices
This looks like a case of print terminology not aligning with the braille definition of the print material. So, I would transcribe the print items you attached to your question according to the [u]Braille Formats 2011 guidelines for tables.[/u]
Nonetheless, I urge you to retain the column/row layout of these tables if at all possible and to avoid the listed, linear, or stairstep formats, so that these print items retain what similarities they have to traditional mathematical matrices.
Thank you for your question.
–Kyle