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@article{492749, author = {Kolář, Ivan and Vitolo, Raffaele}, article_number = {3}, keywords = {Euler morphism; Helmholtz operator; natural operator}, language = {eng}, issn = {0305-0041}, journal = {Math. Proc. Camb. Phil. Soc.}, title = {On the Helmholtz operator for Euler morphisms}, volume = {135}, year = {2003} }
TY - JOUR ID - 492749 AU - Kolář, Ivan - Vitolo, Raffaele PY - 2003 TI - On the Helmholtz operator for Euler morphisms JF - Math. Proc. Camb. Phil. Soc. VL - 135 IS - 3 SP - 277-290 EP - 277-290 SN - 03050041 KW - Euler morphism KW - Helmholtz operator KW - natural operator N2 - The variational sequence describes the Helmholtz conditions for local variationality in terms of the Helmholtz map, which is defined on a factor space. We study a tensor modification called the Helmholtz operator. For the first and second order cases we prove that, up to a multiplicative constant, the Helmholtz operator is the unique natural operator of the type in question. ER -
KOLÁŘ, Ivan a Raffaele VITOLO. On the Helmholtz operator for Euler morphisms. \textit{Math. Proc. Camb. Phil. Soc.}. 2003, roč.~135, č.~3, s.~277-290. ISSN~0305-0041.
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