Offdiagonalts
Offdiagonalts is a term used in various fields, most notably in mathematics and physics, to refer to elements of a matrix that are not located on the main diagonal. The main diagonal of a square matrix consists of the elements from the top-left corner to the bottom-right corner. All other elements are considered off-diagonal.
In linear algebra, matrices are fundamental objects used to represent transformations, systems of equations, and data.
In physics, particularly in quantum mechanics and condensed matter physics, the Hamiltonian matrix often contains off-diagonal