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Equivalence and symmetries of first order differential equations

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F08%3APU70523" target="_blank" >RIV/00216305:26110/08:PU70523 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Equivalence and symmetries of first order differential equations

  • Original language description

    In this article, the equivalence and symmetries of underdetermined differential equations and differential equations with deviations of the first order are considered with respect to the pseudogroup of transformations $bar x=varphi (x),$ $bar y=bar y(bar x)=L(x)y(x).$ That means, the transformed unknown function $bar y$ is obtained by means of the change of the independent variable and subsequent multiplication by a~nonvanishing factor. Instead of the common direct calculations, we use some more advanced tools from differential geometry, however, exposition is self--contained and only the most fundamental properties of differential forms are employed. We refer to analogous achievements in the literature. In particular, the generalized higher symmetry problem involving a~finite number of invariants of the kind $F^j=a_j y, Pi |z_i|^{k^j_i}=a_j y |z_1|^{k^j_1} ldots |z_m|^{k^j_m}=a_j(x)y|y(xi_1)|^{k^j_1}ldots |y(xi_m)|^{k^j_m}$ is compared to similar results obtained by means

  • Czech name

    Ekvivalence a symetrie diferenciálních rovnic prvního řádu

  • Czech description

    V clánku jsou vyšetrovány ekvivalence a symetrie nedourcených diferenciálních rovnic a diferenciálních rovnic s odchýlenými argumenty s ohledem na pseudogrupu transformací $bar x=varphi (x),$ $bar y=bar y(bar x)=L(x)y(x).$ To znamená, že transformovaná neznámá funkce $bar y$ vzniká zámenou nezávisle promenné a násobením nenulovou funkcí. Namísto dlouhých složitých prímých výpoctu jsou použity pokrocilé prostredky diferenciální geometrie. Jsou využívány jen nejzákladnejší vlastnosti diferenciálníchforem, které jsou v clánku vysvetleny.

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    BA - General mathematics

  • OECD FORD branch

Result continuities

  • Project

  • Continuities

    Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2008

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Czechoslovak Mathematical Journal

  • ISSN

    0011-4642

  • e-ISSN

  • Volume of the periodical

    58

  • Issue of the periodical within the volume

    133

  • Country of publishing house

    CZ - CZECH REPUBLIC

  • Number of pages

    31

  • Pages from-to

  • UT code for WoS article

  • EID of the result in the Scopus database