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发表于 2025-3-21 23:05:16
Geometric and Algebraic Structures in Differential Equations978-94-009-0179-7
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发表于 2025-3-22 04:02:40
Introduction, arose in summer 1992, when one of the editors (P.K.) was visiting the other editor (J.K.) in Moscow. The basic idea was to bring closer and intensify activities of mathematicians and mathematical physicists doing research in this field. The decision was taken that it would be a small workshop for s
护身符
发表于 2025-3-22 04:50:59
The Cohomology of Invariant Variational Bicomplexes,mology of the Γ invariant variational bicomplex (Ω.(..(.)),d.,d.) and the associated Γ invariant Euler-Lagrange complex. As one application of our general theory, we completely solve the local invariant inverse problem of the calculus of variations for finite-dimensional infinitesimal Lie transforma
缩影
发表于 2025-3-22 09:19:26
The Use of Factors to Discover Potential Systems or Linearizations,he notion of potential conservation laws, arising from specific types of factors, which lead to useful potential systems. Point symmetries of a potential system could yield nonlocal symmetries of the given system and its linearization by a noninvertible mapping. We also introduce the notion of linea
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发表于 2025-3-22 13:15:14
A Method for Computing Symmetries and Conservation Laws of Integro-Differential Equations,equation to a system of boundary differential equations and in computing symmetries and conservation laws of this system. A geometry of boundary differential equations is constructed like the differential case. Results of the computation for the Smoluchowski’s coagulation equation are given.
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发表于 2025-3-23 03:54:16
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发表于 2025-3-23 07:05:24
Graded Differential Equations and Their Deformations: A Computational Theory for Recursion Operatorraded Frölicher-Nijenhuis bracket cohomological invariants ..(.) are related to each object (.,∇) of the theory. Within this framework, ...) generalizes the Lie algebra of symmetries for PDE’s, while ..(.) are identified with equivalence classes of infinitesimal deformations. It is shown that elemen