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Unitary group. In mathematics, the unitary group of degree n, denoted U ( n ), is the group of n × n unitary matrices, with the group operation of matrix multiplication. The unitary group is a subgroup of the general linear group GL (n, C). Hyperorthogonal group is an archaic name for the unitary group, especially over finite fields.
Z-Library (abbreviated as z-lib, formerly BookFinder) is a shadow library project for file-sharing access to scholarly journal articles, academic texts and general-interest books. It began as a mirror of Library Genesis, but has since expanded dramatically. [6] [7]
United Nations. The United Nations ( UN) is a diplomatic and political [2] international organization whose stated purposes are to maintain international peace and security, develop friendly relations among nations, achieve international cooperation, and serve as a centre for harmonizing the actions of nations. [3]
Use WebMD’s Pill Identifier to find and identify any over-the-counter or prescription drug, pill, or medication by color, shape, or imprint and easily compare pictures of multiple drugs.
The member states of the United Nations comprise 193 sovereign states. The United Nations (UN) is the world's largest intergovernmental organization. All members have equal representation in the UN General Assembly. [3] The Charter of the United Nations defines the rules for admission of member states.
In linear algebra, an invertible complex square matrix U is unitary if its matrix inverse U−1 equals its conjugate transpose U*, that is, if. where I is the identity matrix . In physics, especially in quantum mechanics, the conjugate transpose is referred to as the Hermitian adjoint of a matrix and is denoted by a dagger (†), so the ...
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