Примеры использования Quadratic form на Английском языке и их переводы на Русский язык
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Rational Quadratic Forms.
A nondegenerate dual conic section is analogously defined by a quadratic form.
Since the quadratic form is a scalar, so is its expectation.
This is exactly what Minkowski did for quadratic form with fractional coefficients.
An associated quadratic form or manifold- for example, the E8 manifold has intersection form given by the E8 lattice.
For every set of invariants satisfying these relations,there is a quadratic form over K with these invariants.
A quadratic form(not quadratic equation) is any polynomial in which each term has variables appearing exactly twice.
Klein and Nagata showed that the ring R/Q is a UFD whenever Q is a nonsingular quadratic form in the X's and n is at least 5.
A given quadratic form is said to represent a natural number if substituting specific numbers for the variables gives the number.
There is a connection between the theory of integral binary quadratic forms and the arithmetic of quadratic number fields.
For example,(nondegenerate) quadratic forms of dimension n over k are classified by H1(k, O(n)), and central simple algebras of degree n over k are classified by H1k, PGLn.
Some examples among the classical groups are: Every nondegenerate quadratic form q over a field k determines a reductive group G SOq.
Linear algebra: vector spaces and linear maps, basis, dimension, systems of linear equations, Jordan normal form, characteristic andminimal polynomials, quadratic form, positivity.
The model has a negatively sloping quadratic form which means that the improvements in GDP emission intensity are decreasing.
As mentioned earlier, Minkowski created andproved a similar theory for quadratic forms that had fractions as coefficients.
Example: Let q be a nondegenerate quadratic form of even dimension 2n over a field k of characteristic not 2, with n≥ 5.
As stated by Kaplansky,"The 11th Problem is simply this: classify quadratic forms over algebraic number fields.
The symmetrization and anti-symmetrization of a bilinear map are bilinear; thus away from 2, every bilinear form is a sum of a symmetric form and a skew-symmetric form, andthere is no difference between a symmetric form and a quadratic form.
Merkurjev's work focuses on algebraic groups, quadratic forms, Galois cohomology, algebraic K-theory and central simple algebras.
Likewise, the orthogonal group O(q)is the subgroup of the general linear group that preserves a nondegenerate quadratic form q on a vector space over a field k.
When k is algebraically closed,any two(nondegenerate) quadratic forms of the same dimension are isomorphic, and so it is reasonable to call this group SOn.
As a result, the problem of classifying reductive groups over k essentially includes the problem of classifying all quadratic forms over k or all central simple algebras over k.
In this case, the desired effect in applying a preconditioner is to make the quadratic form of the preconditioned operator P- 1 A{\displaystyle P^{-1}A} with respect to the P{\displaystyle P}-based scalar product to be nearly spherical.
The name spectral theory was introduced by David Hilbert in his original formulation of Hilbert space theory,which was cast in terms of quadratic forms in infinitely many variables.
For example, Witt's decomposition theorem says that a nondegenerate quadratic form over a field is determined up to isomorphism by its Witt index together with its anisotropic kernel.
Wilson(2010b) gave a simplified construction of the Ree groups as the symmetries of a 26-dimensional space over the field of order 22n+1 preserving a quadratic form, a cubic form, and a partial multiplication.
If F is a quadratic form in n variables, then the theta function associated with F is θ F( z)∑ m∈ Z n e 2 π i z F( m){\displaystyle\theta_{ F}( z)=\ sum_{ m\ in\ mathbb{ Z}^{n}}e^{2\pi izF(m)}} with the sum extending over the lattice of integers ℤn.
An example of an ovoid is the elliptic quadric, the set of zeros of the quadratic form x1x2+ f(x3, x4),where f is an irreducible quadratic form in two variables over GFq.
If the quadratic form takes only non-negative(respectively only non-positive) values, the symmetric matrix is called positive-semidefinite(respectively negative-semidefinite); hence the matrix is indefinite precisely when it is neither positive-semidefinite nor negative-semidefinite.
Gauss and those who followed found that if we change variables in certain ways,the new quadratic form represented the same natural numbers as the old, but in a different, more easily interpreted form. .