### Related

##### matrix

A: matrix([1/3,-7/12]...

B: matrix([3,7],[0,4]);

A.B;

Calculate

##### matrix

a:matrix([3,2],[5,6]);

det ([2,3],[2,5]);

Calculate

##### matrix-permanent

a: matrix([0,1,1,1,1,...

b: permanent(a);

Calculate

##### matrix

x: matrix ([a, a,0,0]...

Calculate

v1:[1,4,69];

v2:[2,-3,28];

v3:[-3,2,-37];

Calculate

##### matrix

m:matrix([1,3,4],[1,0...

v:matrix([-11/9],[14/...

m.v;

Calculate

##### matrix

m:matrix([1,0,0,0],[0...

r:matrix([-1,0,0,0],[...

x=m*r;

Calculate

##### matrix

m:matrix([10.6, -9.7,...

m1:matrix([0],[x], [y]);

m.m1;

Calculate

##### matrix-permanent

a: matrix([1,1,1,0,1]...

permanent(a);

Calculate

##### matrix

A:matrix([c3, -s3,0],...

Calculate

### [identity,matrix]

Run Example
```(%i1)A:matrix([.8,.1,.1],[.1,.7,.2],[.1,.1,.8]);
[ 0.8  0.1  0.1 ]
[               ]
(%o1)                          [ 0.1  0.7  0.2 ]
[               ]
[ 0.1  0.1  0.8 ]
(%i2) A.A;
[ 0.66  0.16  0.18 ]
[                  ]
(%o2)                        [ 0.17  0.52  0.31 ]
[                  ]
[ 0.17  0.16  0.67 ]
(%i3) I:identity(3);
(%o3)                                  3
(%i4) ```
Run Example
```q:matrix([a11,a12,a13,a14],[a21,a22,a23,a34],[a31,a32,a33,a34],[a41,a42,a43,a44]);
[ a11  a12  a13  a14 ]
[                    ]
[ a21  a22  a23  a34 ]
(%o1)                       [                    ]
[ a31  a32  a33  a34 ]
[                    ]
[ a41  a42  a43  a44 ]
(%i2) d:identity(4);
(%o2)                                  4
(%i3) ```

### Related Help

Help for Identity

Help for Matrix