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  2. Jacobian matrix and determinant - Wikipedia

    en.wikipedia.org/.../Jacobian_matrix_and_determinant

    The Jacobian determinant is sometimes simply referred to as "the Jacobian". The Jacobian determinant at a given point gives important information about the behavior of f near that point. For instance, the continuously differentiable function f is invertible near a point p ∈ R n if the Jacobian determinant at p is non-zero. This is the inverse ...

  3. Jacobi's formula - Wikipedia

    en.wikipedia.org/wiki/Jacobi's_formula

    In matrix calculus, Jacobi's formula expresses the derivative of the determinant of a matrix A in terms of the adjugate of A and the derivative of A. [1]If A is a differentiable map from the real numbers to n × n matrices, then

  4. Gauss map - Wikipedia

    en.wikipedia.org/wiki/Gauss_Map

    The Gauss map can always be defined locally (i.e. on a small piece of the surface). The Jacobian determinant of the Gauss map is equal to Gaussian curvature, and the differential of the Gauss map is called the shape operator. Gauss first wrote a draft on the topic in 1825 and published in 1827. [1] [citation needed]

  5. Relative scalar - Wikipedia

    en.wikipedia.org/wiki/Relative_scalar

    that is, the determinant of the Jacobian of the transformation. [1] A scalar density refers to the w = 1 {\displaystyle w=1} case. Relative scalars are an important special case of the more general concept of a relative tensor .

  6. Jacobi rotation - Wikipedia

    en.wikipedia.org/wiki/Jacobi_rotation

    Furthermore, the eigenvalues and determinant of are identical to those of and T1 is also symmetric, confirming that the Jacobian rotation was performed correctly. The next iteration for T 2 {\displaystyle T_{2}} will select cell [3,4] which contains the highest absolute value, 8.5794421, of all the cells to be zeroed..

  7. Jacobi matrix - Wikipedia

    en.wikipedia.org/wiki/Jacobi_matrix

    Jacobian matrix and determinant of a smooth map between Euclidean spaces or smooth manifolds Jacobi operator (Jacobi matrix), a tridiagonal symmetric matrix appearing in the theory of orthogonal polynomials

  8. Curvilinear coordinates - Wikipedia

    en.wikipedia.org/wiki/Curvilinear_coordinates

    The angles that the q 1 line and that axis form with the x axis become closer in value the closer one moves towards point P and become exactly equal at P. Let point E be located very close to P, so close that the distance PE is infinitesimally small. Then PE measured on the q 1 axis almost coincides with PE measured on the q 1 line.

  9. Jacobi coordinates - Wikipedia

    en.wikipedia.org/wiki/Jacobi_coordinates

    Jacobi coordinates for two-body problem; Jacobi coordinates are = + and = with = +. [1] A possible set of Jacobi coordinates for four-body problem; the Jacobi coordinates are r 1, r 2, r 3 and the center of mass R.