[Math] the branch of mathematics that combines discrete mathematics and linear algebra known as

Question

Many different branches of mathematics are combined together.
For example, algebra and topology combine to give Algebraic Topology; algebra and geometry give rise to Algebraic Geometry, etc.

What is the name of the branch which combines Discrete Mathematics and Linear Algebra, if such a branch exists? If not, which subfields of discrete mathematics make significant use of linear algebra and do they have specific names?

Answer 1

Spectral graph theory is a subfield in which linear algebra is used heavily to study discrete mathematics. Wikipedia:

"In mathematics, spectral graph theory is the study of properties of a graph in relationship to the characteristic polynomial, eigenvalues, and eigenvectors of matrices associated to the graph, such as its adjacency matrix or Laplacian matrix."