Hermitian Matrix

Hermitian matrix

[er′mish·ən ′mā·triks] (mathematics) A matrix which equals its conjugate transpose matrix, that is, is self-adjoint.

Hermitian Matrix

(or self-adjoint matrix), a matrix coincident with its adjoint, that is, a matrix such that a_ik= ā_ki, where ā is the complex conjugate of the number a. If the elements of a Hermitian matrix are real, then the matrix is symmetric. A Hermitian matrix has real eigenvalues λ₁, λ₂, …, λ_n and corresponds to a linear transformation in a complex n-dimensional space that reduces to stretchings by ǀλ_iǀ in n mutually perpendicular directions and reflections in the planes orthogonal to the directions for which λ_i < 0. A bilinear form

whose coefficients form a Hermitian matrix, is called a Hermitian form. Any matrix can be written in the form A₁ + iA₂, where A₁ and A₂ are Hermitian matrices, and in the form A ∪, where A is a Hermitian matrix and U is a unitary matrix. If A and B are Hermitian matrices, then A B is a Hermitian matrix if and only if A and B commute.

单词	hermitian matrix
释义	Hermitian matrix Hermitian matrix n (Mathematics) maths a matrix whose transpose is equal to the matrix of the complex conjugates of its entries [C20: named after Charles Hermite (1822–1901), French mathematician] Hermitian Matrix Hermitian matrix [er′mish·ən ′mā·triks] (mathematics) A matrix which equals its conjugate transpose matrix, that is, is self-adjoint. Hermitian Matrix (or self-adjoint matrix), a matrix coincident with its adjoint, that is, a matrix such that a_ik= ā_ki, where ā is the complex conjugate of the number a. If the elements of a Hermitian matrix are real, then the matrix is symmetric. A Hermitian matrix has real eigenvalues λ₁, λ₂, …, λ_n and corresponds to a linear transformation in a complex n-dimensional space that reduces to stretchings by ǀλ_iǀ in n mutually perpendicular directions and reflections in the planes orthogonal to the directions for which λ_i < 0. A bilinear form whose coefficients form a Hermitian matrix, is called a Hermitian form. Any matrix can be written in the form A₁ + iA₂, where A₁ and A₂ are Hermitian matrices, and in the form A ∪, where A is a Hermitian matrix and U is a unitary matrix. If A and B are Hermitian matrices, then A B is a Hermitian matrix if and only if A and B commute.
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