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• 15:18, 18 March 2025 Verbovet talk contribs created page Seminar talk, 26 March 2025 (Created page with "{{Talk | speaker = Konstantin Druzhkov | title = A non-trivial conservation law with a trivial characteristic | abstract = As far as I am aware, no nontrivial conservation laws surviving to the second page of Vinogradov's C-spectral sequence have been established. It turns out that presymplectic structures that cannot be described in terms of cosymmetries produce such conservation laws for closely related overdetermined systems. In particular, the presymplectic structure...")