ya yes its there a matrix called zero matrix
A zero matrix is a matrix in which all of the entries are zero.
A sparse matrix is a matrix in which most of the elements are zero.
a squar matrix A is called involutary matrix. if A^2=I
yes, it is true that the transpose of the transpose of a matrix is the original matrix
cartillage
The matrix of connective tissue is composed of collagen, reticular, and elastic fibers embedded in ground substance (typically composed of water with stabilizing proteins). The fibers are made by fibroblasts and the most abundant in the body is collagen, while the least abundant is elastic.
Don Davis
Collagen Fibers
A Hadamard Matrix is a square matrix composed of 1 or -1. Using a square matrix system the hadamard matrix could be created
The matrix consist of fibers and ground substances that determines the character of the matrix, which in turn difines the kind of connective tissue.
epiglottis
Collagen fibres, reticular fibres, and elastic fibres and protein fibres found in the cellular matrix.
collagen
It is composed primarily of hyaluronic acid.
The two major components of the matrix are ground substances and fibers. Fibers can be broken into the classes; collagen, elastic and reticular fibers.
Although the construction details of the Chobham Common armour remain a secret, it has been described as being composed of ceramic tiles encased within a metal matrix and bonded to a backing plate and several elastic layers.