suivant: Identity matrix : idn
monter: The CAS functions
précédent: Table with string as
Table des matières
A matrix is represented by a list of lists, all having the same size.
In the Xcas answers, the matrix delimiters are  (bold brackets).
For example, [1,2,3] is the matrix [[1,2,3]] with only one row,
unlike [1,2,3] (normal brackets) which is the list [1,2,3].
In this document, the input notation ([[1,2,3]]) will be used for input
giac documentation written by Renée De Graeve and Bernard Parisse