Результаты поиска по 'multifocal lemniscates':
Найдено статей: 3
  1. Rakcheeva T.A.
    Polypolar coordination and symmetries
    Computer Research and Modeling, 2010, v. 2, no. 4, pp. 329-341

    The polypolar system of coordinates is formed by a family of a parametrized on a radius isofocal of kf-lemniscates. As well as the classical polar system of coordinates, it characterizes a point of a plane by a polypolar radius ρ and polypolar angle φ. For anyone connectedness a family isometric of curve ρ = const – lemniscates and family gradient of curves φ = const – are mutually orthogonal conjugate coordinate families. The singularities of polypolar coordination, its symmetry, and also curvilinear symmetries on multifocal lemniscates are considered.

    Keywords: curves, focuses, multifocal lemniscates, Cassini ovals, polar system of coordinates, coordinate families, groups of symmetries, curvilinear symmetries.
    Views (last year): 1.
  2. Rakcheeva T.A.
    Polypolar lemniscate coordinate system
    Computer Research and Modeling, 2009, v. 1, no. 3, pp. 251-261

    The polypolar coordinate system, as well as classical polar, characterizes a point on a plane by polar radius ρ and polar angle φ, but utilizes multiple poles instead of one pole. Such referencing can be provided by a class of multifocal lemniscates. The family of isometric curves ρ=const — lemniscates — and family of gradient curves φ=const are mutually orthogonal conjugate families.

    Keywords: polypolar coordinate system.
    Citations: 3 (RSCI).
  3. Rakcheeva T.A.
    Criteria and convergence of the focal approxmation
    Computer Research and Modeling, 2013, v. 5, no. 3, pp. 379-394

    Methods of the solution of a problem of focal approximation — approach on point-by-point given smooth closed empirical curve by multifocal lemniscates are investigated. Criteria and convergence of the developed approached methods with use of the description, both in real, and in complex variables are analyzed. Topological equivalence of the used criteria is proved.

    Keywords: curves, approximation, lemniscates, foci, criterion of curves nearness, basic, shape, invariant, algorithm, freedom degrees.
    Views (last year): 2.

Indexed in Scopus

Full-text version of the journal is also available on the web site of the scientific electronic library eLIBRARY.RU

The journal is included in the Russian Science Citation Index

The journal is included in the RSCI

International Interdisciplinary Conference "Mathematics. Computing. Education"

Copyright © 2009–2024 Institute of Computer Science