Function kron 

pub fn kron<T: ComplexField>(
    dst: MatMut<'_, T>,
    lhs: MatRef<'_, impl Conjugate<Canonical = T>>,
    rhs: MatRef<'_, impl Conjugate<Canonical = T>>,
)

kronecker product of two matrices

the kronecker product of two matrices $A$ and $B$ is a block matrix $B$ with the following structure:

C = [ a[(0, 0)] * B    , a[(0, 1)] * B    , ... , a[(0, n-1)] * B    ]
    [ a[(1, 0)] * B    , a[(1, 1)] * B    , ... , a[(1, n-1)] * B    ]
    [ ...              , ...              , ... , ...              ]
    [ a[(m-1, 0)] * B  , a[(m-1, 1)] * B  , ... , a[(m-1, n-1)] * B  ]

panics

panics if dst does not have the correct dimensions. the dimensions of dst must be A.nrows() * B.nrows() by A.ncols() * B.ncols().

example

use faer::linalg::kron::kron;
use faer::{Mat, mat};

let a = mat![[1.0, 2.0], [3.0, 4.0]];
let b = mat![[0.0, 5.0], [6.0, 7.0]];
let c = mat![
	[0.0, 5.0, 0.0, 10.0],
	[6.0, 7.0, 12.0, 14.0],
	[0.0, 15.0, 0.0, 20.0],
	[18.0, 21.0, 24.0, 28.0],
];
let mut dst = Mat::zeros(4, 4);
kron(dst.as_mut(), a.as_ref(), b.as_ref());
assert_eq!(dst, c);