For ten points, name the fundamental mathematical object that comes in Dirac and Kronecker types.
In an orthonormal Hilbert space, the inner product of two indexed basis functions is equal to the discrete variety of this operating on the indices. In bound-state problems with wells comprised of the other version of this, taking a k-space complex Fourier transform often leads to a fairly direct solution via its sifting property. In The Principles of Quantum Mechanics, its proposer admits that its name is misleading, though it served its purpose of diagonalizing a quantum energy matrix. For ten points, name the fundamental mathematical object that comes in Dirac and Kronecker types.
In an orthonormal Hilbert space, the inner product of two indexed basis functions is equal to the discrete variety of this operating on the indices.
delta function