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  2. Canonical form - Wikipedia

    en.wikipedia.org/wiki/Canonical_form

    Canonical form can also mean a differential form that is defined in a natural ... For example, the equation of a line may be written as a linear equation in point ...

  3. Jordan normal form - Wikipedia

    en.wikipedia.org/wiki/Jordan_normal_form

    The Jordan form is used to find a normal form of matrices up to conjugacy such that normal matrices make up an algebraic variety of a low fixed degree in the ambient matrix space. Sets of representatives of matrix conjugacy classes for Jordan normal form or rational canonical forms in general do not constitute linear or affine subspaces in the ...

  4. State-space representation - Wikipedia

    en.wikipedia.org/wiki/State-space_representation

    In control engineering and system identification, a state-space representation is a mathematical model of a physical system that uses state variables to track how inputs shape system behavior over time through first-order differential equations or difference equations. These state variables change based on their current values and inputs, while ...

  5. Canonical transformation - Wikipedia

    en.wikipedia.org/wiki/Canonical_transformation

    Restricted canonical transformations are coordinate transformations where transformed coordinates Q and P do not have explicit time dependence, i.e., = (,) and = (,).The functional form of Hamilton's equations is ˙ =, ˙ = In general, a transformation (q, p) → (Q, P) does not preserve the form of Hamilton's equations but in the absence of time dependence in transformation, some ...

  6. Hamiltonian mechanics - Wikipedia

    en.wikipedia.org/wiki/Hamiltonian_mechanics

    Hamilton's equations give the time evolution of coordinates and conjugate momenta in four first-order differential equations, ˙ = ˙ = ⁡ ˙ = ⁡ ⁡ ⁡ ˙ = Momentum ⁠ ⁠, which corresponds to the vertical component of angular momentum ⁠ = ⁡ ⁡ ˙ ⁠, is a constant of motion. That is a consequence of the rotational symmetry of the ...

  7. Elliptic partial differential equation - Wikipedia

    en.wikipedia.org/wiki/Elliptic_partial...

    This equation is linear in the "leading-order terms" but allows nonlinear expressions involving the function values and their first derivatives; this is sometimes called a quasilinear equation. A canonical form asks for a transformation w = w(x, y) and z = z(x, y) of the domain so that, when u is viewed as a function of w and z, the above ...

  8. Abel equation of the first kind - Wikipedia

    en.wikipedia.org/wiki/Abel_equation_of_the_first...

    brings the Abel equation of the first kind to the canonical form u ′ = u 3 + ϕ ( ξ ) . {\displaystyle u'=u^{3}+\phi (\xi ).\,} Dimitrios E. Panayotounakos and Theodoros I. Zarmpoutis discovered an analytic method to solve the above equation in an implicit form.

  9. Companion matrix - Wikipedia

    en.wikipedia.org/wiki/Companion_matrix

    Rather, the Jordan canonical form of () contains one Jordan block for each distinct root; if the multiplicity of the root is m, then the block is an m × m matrix with on the diagonal and 1 in the entries just above the diagonal. in this case, V becomes a confluent Vandermonde matrix. [2]