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U-1 Visa
U1, U.I or U-1 may refer to: Mathematics *U(1), the degree one ''unitary group'' Military *U-1, the 1924 United States Army Air Service aircraft designation system, USAF and 1962 United States Tri-Service aircraft designation system, US Military's designation for the De Havilland Canada DHC-3 Otter light transport aircraft *U-1, Soviet Union military aircraft designation systems, Soviet designation for Avro 504 trainer. *Multiple German U-boats named German submarine U-1, ''U-1'' *Oberursel U.I, an early German aircraft engine *HDMS U-1, a Danish submarine *SM U-1 (Austria-Hungary), SM U-1, an Austro-Hungarian submarine, lead ship of the U-1-class submarine (Austria-Hungary), U-1 class Entertainment *U1 Technology, a game and software developing company *''Ultima I: The First Age of Darkness'', a 1981 video game People *Yuvan Shankar Raja, U1, alias for Yuvan Shankar Raja (born 1979), a Tamil musician and film composer *U-1, the main character in the video game ''Gitaroo Man'' f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unitary Group
In mathematics, the unitary group of degree ''n'', denoted U(''n''), is the group of unitary matrices, with the group operation of matrix multiplication. The unitary group is a subgroup of the general linear group . Hyperorthogonal group is an archaic name for the unitary group, especially over finite fields. For the group of unitary matrices with determinant 1, see Special unitary group. In the simple case , the group U(1) corresponds to the circle group, consisting of all complex numbers with absolute value 1, under multiplication. All the unitary groups contain copies of this group. The unitary group U(''n'') is a real Lie group of dimension ''n''2. The Lie algebra of U(''n'') consists of skew-Hermitian matrices, with the Lie bracket given by the commutator. The general unitary group (also called the group of unitary similitudes) consists of all matrices ''A'' such that ''A''∗''A'' is a nonzero multiple of the identity matrix, and is just the product of the unitary gr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
