Definitions for "Hilbert"
The Hilbert matrix A has elements aij = 1/(i+j-1). It is symmetric, positive definite, totally positive, and a Hankel matrix.
Hilbert matrices Identity matrix
Hilbert is a lunar crater that is located on the far side of the Moon, just past the southeast limb. It lies just beyond the region of the surface that is occasionally brought into view due to libration, and so this feature can not be observed directly from the Earth.
Keywords:  mathematician, german
German mathematician (1862-1943)