Superfixed positions in the geometry of Goursat flags.
Mormul, Piotr (2002)
Zeszyty Naukowe Uniwersytetu Jagiellońskiego. Universitatis Iagellonicae Acta Mathematica
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Displaying similar documents to “Contact hamiltonians distinguishing locally certain Goursat systems”
Superfixed positions in the geometry of Goursat flags.
Anisotropic complex structure on the pseudo-Euclidean Hurwitz pairs
W. Królikowski (1991)
Annales Polonici Mathematici
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The concept of supercomplex structure is introduced in the pseudo-Euclidean Hurwitz pairs and its basic algebraic and geometric properties are described, e.g. a necessary and sufficient condition for the existence of such a structure is found.
The Hausdorff dimension of certain sets arising from Diophantine approximation by restricted sequences of integer vectors
Bryan P. Rynne (1992)
Acta Arithmetica
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On the subspace of .
Gubarev, V.Yu. (2009)
Sibirskij Matematicheskij Zhurnal
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The proof of the Nirenberg-Treves conjecture
Nils Dencker (2003)
Journées équations aux dérivées partielles
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We prove the Nirenberg-Treves conjecture : that for principal type pseudo-differential operators local solvability is equivalent to condition (). This condition rules out certain sign changes of the imaginary part of the principal symbol along the bicharacteristics of the real part. We obtain local solvability by proving a localizable estimate for the adjoint operator with a loss of two derivatives (compared with the elliptic case). The proof involves a new metric in the Weyl (or Beals-Fefferman)...
Some conditions for a -semigroup to be asymptotically finite-dimensional.
Emel'yanov, Eh.Yu. (2003)
Sibirskij Matematicheskij Zhurnal
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Tensorial version of the calculus of variations.
Casciaro, Biagio C., Konderak, Jerzy J. (2002)
Zeszyty Naukowe Uniwersytetu Jagiellońskiego. Universitatis Iagellonicae Acta Mathematica
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Existence and construction of Vessiot connections.
Fesser, Dirk, Seiler, Werner M. (2009)
SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]
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Self-equivalence 3-rd order ODEs by time-fixed transformations.
Nadjafikhah, Mehdi, Forough, Ahmad Reza (2008)
APPS. Applied Sciences
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State-space realization of nonlinear control systems: unification and extension via pseudo-linear algebra
Juri Belikov, Ülle Kotta, Maris Tõnso (2012)
Kybernetika
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In this paper the tools of pseudo-linear algebra are applied to the realization problem, allowing to unify the study of the continuous- and discrete-time nonlinear control systems under a single algebraic framework. The realization of nonlinear input-output equation, defined in terms of the pseudo-linear operator, in the classical state-space form is addressed by the polynomial approach in which the system is described by two polynomials from the non-commutative ring of skew polynomials....