The infixed operators + and .+ (resp. - and .-) are used for the addition (resp. subtraction) of two matrices.
⎡ ⎢ ⎣ |
| ⎤ ⎥ ⎦ |
⎡ ⎢ ⎣ |
| ⎤ ⎥ ⎦ |
Remark.
+ and - can be used as prefixed operators; in this
case they must be quoted, ’+’ and ’-’
(see Section 5.42.3 and Section 5.42.4).
⎡ ⎢ ⎣ |
| ⎤ ⎥ ⎦ |
⎡ ⎢ ⎣ |
| ⎤ ⎥ ⎦ |