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  2. Indefinite orthogonal group - Wikipedia

    en.wikipedia.org/wiki/Indefinite_orthogonal_group

    π 0 (O(p, q)) ≅ C 2 × C 2 is the Klein four-group, with each factor being whether an element preserves or reverses the respective orientations on the p and q dimensional subspaces on which the form is definite; note that reversing orientation on only one of these subspaces reverses orientation on the whole space.

  3. Orthogonal group - Wikipedia

    en.wikipedia.org/wiki/Orthogonal_group

    The connecting homomorphism from H 0 (O V), which is simply the group O V (F) of F-valued points, to H 12) is essentially the spinor norm, because H 12) is isomorphic to the multiplicative group of the field modulo squares. There is also the connecting homomorphism from H 1 of the orthogonal group, to the H 2 of the kernel of the spin ...

  4. Symplectic group - Wikipedia

    en.wikipedia.org/wiki/Symplectic_group

    As explained below, the Lie algebra of Sp(n) is the compact real form of the complex symplectic Lie algebra sp(2n, C). Sp(n) is a real Lie group with (real) dimension n(2n + 1). It is compact and simply connected. [13] The Lie algebra of Sp(n) is given by the quaternionic skew-Hermitian matrices, the set of n-by-n quaternionic matrices that satisfy

  5. Linear form - Wikipedia

    en.wikipedia.org/wiki/Linear_form

    In mathematics, a linear form (also known as a linear functional, [1] a one-form, or a covector) is a linear map [nb 1] from a vector space to its field of scalars (often, the real numbers or the complex numbers).

  6. Algebraic structure - Wikipedia

    en.wikipedia.org/wiki/Algebraic_structure

    These equations induce equivalence classes on the free algebra; the quotient algebra then has the algebraic structure of a group. Some structures do not form varieties, because either: It is necessary that 0 ≠ 1, 0 being the additive identity element and 1 being a multiplicative identity element, but this is a nonidentity;

  7. Individual psychological assessment - Wikipedia

    en.wikipedia.org/wiki/Individual_psychological...

    Individual psychological assessment (IPA) is a tool used by organizations to make decisions on employment. IPA allows employers to evaluate and maintain potential candidates for hiring, promotion, and development by using a series of job analysis instruments such as position analysis questionnaires (PAQ), occupational analysis inventory (OAI), and functional job analysis (FJA).

  8. List of named matrices - Wikipedia

    en.wikipedia.org/wiki/List_of_named_matrices

    When combined with the I 2 identity matrix, they form an orthogonal basis for the 2 × 2 complex Hermitian matrices. Redheffer matrix: Encodes a Dirichlet convolution. Matrix entries are given by the divisor function; entires of the inverse are given by the Möbius function. a ij are 1 if i divides j or if j = 1; otherwise, a ij = 0. A (0, 1 ...

  9. Canonical normal form - Wikipedia

    en.wikipedia.org/wiki/Canonical_normal_form

    In Boolean algebra, any Boolean function can be expressed in the canonical disjunctive normal form , [1] minterm canonical form, or Sum of Products (SoP or SOP) as a disjunction (OR) of minterms. The De Morgan dual is the canonical conjunctive normal form ( CCNF ), maxterm canonical form , or Product of Sums ( PoS or POS ) which is a ...

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