All public logs

Combined display of all available logs of Geometry of Differential Equations. You can narrow down the view by selecting a log type, the username (case-sensitive), or the affected page (also case-sensitive).

• 18:10, 18 December 2024 Verbovet talk contribs uploaded File:homotopyDO.pdf
• 17:39, 18 December 2024 Verbovet talk contribs created page Seminar talk, 8 January 2025 (Created page with "{{Talk | speaker = Vladimir Rubtsov | title = Towards a theory of homotopy structures for differential equations: First definitions and examples. Part 2 | abstract = We define <math>A_\infty</math>-algebra structures on horizontal and vertical cohomologies of (formally integrable) partial differential equations. Since higher order <math>A_\infty</math>-algebra operations are related to Massey products, our observation implies the existence of invariants for differentia...")
• 20:47, 11 December 2024 Verbovet talk contribs created page File:Inv red I cl.pdf
• 20:47, 11 December 2024 Verbovet talk contribs uploaded File:Inv red I cl.pdf
• 14:03, 10 December 2024 Verbovet talk contribs created page Seminar talk, 18 December 2024 (Created page with "{{Talk | speaker = Vladimir Rubtsov | title = Towards a theory of homotopy structures for differential equations: First definitions and examples | abstract = We define <math>A_\infty</math>-algebra structures on horizontal and vertical cohomologies of (formally integrable) partial differential equations. Since higher order <math>A_\infty</math>-algebra operations are related to Massey products, our observation implies the existence of invariants for differential equat...")
• 14:48, 4 December 2024 Verbovet talk contribs created page Seminar talk, 11 December 2024 (Created page with "{{Talk | speaker = Konstantin Druzhkov | title = Invariant reduction for PDEs. I: Conservation laws of 1+1 systems of evolution equations | abstract = Among various methods for constructing exact solutions of partial differential equations, the symmetry-invariant approach is particularly noteworthy. This method is especially effective in the case of point symmetries, but when it comes to higher symmetries, additional steps are required to obtain invariant solutions. It t...")
• 14:30, 21 November 2024 Verbovet talk contribs created page File:Shifts in gld.pdf
• 14:30, 21 November 2024 Verbovet talk contribs uploaded File:Shifts in gld.pdf
• 15:53, 20 November 2024 Verbovet talk contribs created page Seminar talk, 27 November 2024 (Created page with "{{Talk | speaker = Ekaterina Shemyakova | title = On differential operators generating higher brackets | abstract = On supermanifolds, a Poisson structure can be either even, corresponding to a Poisson  bivector, or odd, corresponding to an odd Hamiltonian quadratic in momenta. An odd  Poisson bracket can also be defined by an odd second-order differential operator that  squares to zero, known as a "BV-type" operator. A higher analog, <math>P_\infty</math> or <math>S...")
• 16:59, 12 November 2024 Verbovet talk contribs moved page Seminar talk, 20 November 2024 to Seminar talk, 20 November 2024, 16:00 without leaving a redirect
• 16:58, 12 November 2024 Verbovet talk contribs created page Seminar talk, 20 November 2024 (Created page with "{{Talk | speaker = Yasushi Ikeda | title = Quantum argument shifts in general linear Lie algebras | abstract = Argument shift algebras in <math>S(g)</math> (where <math>g</math> is a Lie algebra) are Poisson commutative subalgebras (with respect to the Lie-Poisson bracket), generated by iterated argument shifts of Poisson central elements. Inspired by the quantum partial derivatives on <math>U(gl_d)</math> proposed by Gurevich, Pyatov, and Saponov, I and Georgy Sharygin...")
• 16:44, 12 November 2024 Verbovet talk contribs created page Yasushi Ikeda (Created page with "Site: https://www.mathnet.ru/eng/person171663 Ikeda")
• 13:16, 6 November 2024 Verbovet talk contribs created page Seminar talk, 13 November 2024 (Created page with "{{Talk | speaker = Alexander Zheglov | title = Normal forms for differential operators | abstract = In my talk I'll give an overview of the results obtained by me, as well as jointly with co-authors,  related to the problem of classifying commuting (scalar) differential, or more generally, differential-difference or  integral-differential operators in several variables. Considering such rings as subrings of a certain complete non-commutative ring <math>\hat{D}_n^{sym}...")
• 13:06, 6 November 2024 Verbovet talk contribs created page Alexander Zheglov (Created page with "Site: http://dfgm.math.msu.su/people/zheglov/ Zheglov")
• 16:01, 31 October 2024 Verbovet talk contribs created page Seminar talk, 6 November 2024 (Created page with "{{Talk | speaker = Georgy Sharygin | title = Remarkable properties of the full symmetric Toda system | abstract = A full symmetric Toda system is a Hamiltonian dynamical system on the space of symmetric real matrices with zero trace, generalizing the usual open Toda chain. This system is given by the Lax equation <math>\dot L=[L,M(L)]</math>, where <math>M(L)</math> is the (naive) antisymmetrization of the symmetric matrix <math>L</math>: the difference of its super and...")
• 13:20, 10 October 2024 Verbovet talk contribs created page File:IMU talk 9 October 2024.pdf
• 13:20, 10 October 2024 Verbovet talk contribs uploaded File:IMU talk 9 October 2024.pdf
• 09:04, 25 September 2024 Verbovet talk contribs moved page Seminar talk, 25 September 2024 to Seminar talk, 9 October 2024 without leaving a redirect
• 13:49, 18 September 2024 Verbovet talk contribs created page File:Moscow Osja 240918.pdf
• 13:49, 18 September 2024 Verbovet talk contribs uploaded File:Moscow Osja 240918.pdf
• 11:12, 16 September 2024 Verbovet talk contribs created page File:f(s,x) exact upscaling 240918.pdf
• 11:12, 16 September 2024 Verbovet talk contribs uploaded File:f(s,x) exact upscaling 240918.pdf
• 18:32, 10 September 2024 Verbovet talk contribs created page Seminar talk, 25 September 2024 (Created page with "{{Talk | speaker = Oleg Morozov | title = Lax representations for Euler equations of ideal hydrodynamics | abstract = I will discuss Lax representations with non-removable parameters for the Euler equations of ideal hydrodynamics on a 2D Riemannian manifold and for the 3D Euler-Helmholtz equations. | video = | slides = | references = {{arXiv|2409.05752}} | 79YY-MM-DD = 7975-90-74 }}")
• 21:17, 29 August 2024 Verbovet talk contribs created page Seminar talk, 11 September 2024 (Created page with "{{Talk | speaker = Valentin Lychagin | title = On a structure of the first order differential operators | abstract = The various geometrical structures associated with differential operators of the first order shall be discussed as well as notions of singular and regular points. At the end normal forms of operators at regular points will be presented. | video = | slides = | references = | 79YY-MM-DD = 7975-90-88 }}")
• 15:29, 19 August 2024 Verbovet talk contribs created page Seminar talk, 18 September 2024 (Created page with "{{Talk | speaker = Pavel Bedrikovetsky | title = Exact solutions and upscaling in conservation law systems | abstract = Numerous transport processes in nature and industry are described by nxn conservation law systems u,t+f(u),x=0, u=(u1,...,un). This corresponds to upper scale, like rock or core scale in porous media, column length in chemical engineering, or multi-block scale in city transport. The micro heterogeneity at lower scales introduces x- or t-dependencies int...")
• 14:57, 19 August 2024 Verbovet talk contribs created page File:ad PhD letter.pdf
• 14:57, 19 August 2024 Verbovet talk contribs uploaded File:ad PhD letter.pdf
• 14:06, 19 August 2024 Verbovet talk contribs created page Pavel Bedrikovetsky (Created page with "https://www.adelaide.edu.au/directory/pavel.bedrikovetski https://scholar.google.ru/citations?user=aL3CTjsAAAAJ Bedrikovetsky")
• 10:51, 30 May 2024 Verbovet talk contribs created page File:Gauge tractors boundary.pdf
• 10:51, 30 May 2024 Verbovet talk contribs uploaded File:Gauge tractors boundary.pdf
• 12:32, 29 May 2024 Verbovet talk contribs created page Seminar Archive - Spring 2024 (Created page with "{|border="1" cellpadding="10" cellspacing="0" |+style="text-align: left;" |Upcoming and past seminars, Spring 2024 !style="background-color:#666666; color:#ffffff;" |Date !style="background-color:#666666; color:#ffffff;" |Speaker !style="background-color:#666666; color:#ffffff;" |Talk |- |style="background-color:#cedff2;" |14 February 2024* |'''Valentin Lychagin''' |Seminar talk, 14 February 2024|On flows and filtration in the presence of thermodynamic processes: g...")
• 20:46, 15 May 2024 Verbovet talk contribs created page Seminar talk, 22 May 2024 (Created page with "{{Talk | speaker = Maxim Grigoriev | title = Gauge PDEs on manifolds with boundaries and asymptotic symmetries | abstract = We propose a framework to study local gauge theories on manifolds with boundaries and their asymptotic symmetries, which is based on representing them as so-called gauge PDEs. These objects extend the conventional BV-AKSZ sigma-models to the case of not necessarily topological and diffeomorphism invariant systems and are known to behave well when re...")
• 19:56, 15 May 2024 Verbovet talk contribs created page File:Schneider-Invariant divisors and equivariant line bundles.pdf
• 19:56, 15 May 2024 Verbovet talk contribs uploaded File:Schneider-Invariant divisors and equivariant line bundles.pdf
• 16:52, 7 May 2024 Verbovet talk contribs created page Seminar talk, 15 May 2024 (Created page with "{{Talk | speaker = Eivind Schneider | title = Invariant divisors and equivariant line bundles | abstract = Scalar relative invariants play an important role in the theory of group actions on a manifold as their zero sets are invariant hypersurfaces. Relative invariants are central in many applications, where they often are treated locally, since an invariant hypersurface is not necessarily the locus of a single function. Our aim is to outline a global theory of relative...")
• 20:43, 1 May 2024 Verbovet talk contribs created page File:Int Lagr gauge.pdf
• 20:43, 1 May 2024 Verbovet talk contribs uploaded File:Int Lagr gauge.pdf
• 12:28, 23 April 2024 Verbovet talk contribs moved page Seminar talk, Date TBA (Konstantin Druzhkov) to Seminar talk, 1 May 2024 without leaving a redirect
• 16:05, 13 April 2024 Verbovet talk contribs created page Seminar talk, Date TBA (Konstantin Druzhkov) (Created page with "{{Talk | speaker = Konstantin Druzhkov | title = Internal Lagrangians and gauge systems | abstract = In classical mechanics, the Hamiltonian formalism is given in terms of instantaneous phase spaces of mechanical systems. This explains why it can be interpreted as an encapsulation of the Lagrangian formalism into the intrinsic geometry of equations of motion. This observation can be generalized to the case of arbitrary variational equations. To do this, we describe insta...")
• 20:32, 27 March 2024 Verbovet talk contribs created page Seminar talk, 3 April 2024 (Created page with "{{Talk | speaker = Vladimir Rubtsov | title = Besselland: autour and beyond. Part 3 | abstract = A continuation of them talks held on 20 and 27 March. I shall try to explain – why it is interesting to study and to generalize analytic solutions of modified Bessel equation. My talk is based on ongoing projects in progress with V. Buchstaber, I. Gaiur and D. Van Straten. | video = | slides = | references...")
• 18:57, 25 March 2024 Verbovet talk contribs created page Seminar talk, 17 April 2024 (Created page with "{{Talk | speaker = Gerard Helminck | title = A construction of solutions of an integrable deformation of a commutative Lie algebra of skew Hermitian <math>\mathbb{Z}\times\mathbb{Z}</math>-matrices | abstract = Inside the algebra <math>LT_{\mathbb{Z}}(R)</math> of <math>\mathbb{Z} \times \mathbb{Z}</math>-matrices with coefficients from a commutative <math>\mathbb{C}</math>-algebra <math>R</math> that have only a finite number of nonzero diagonals above the central diago...")
• 18:14, 20 March 2024 Verbovet talk contribs created page Seminar talk, 27 March 2024 (Created page with "{{Talk | speaker = Vladimir Rubtsov | title = Besselland: autour and beyond. Part 2 | abstract = A continuation of the talk on 20 March. I shall try to explain – why it is interesting to study and to generalize analytic solutions of modified Bessel equation. My talk is based on ongoing projects in progress with V. Buchstaber, I. Gaiur and D. Van Straten. | video = | slides = | references = | 79YY-MM-DD = 7975-96-79 }}")
• 10:47, 13 March 2024 Verbovet talk contribs created page Seminar talk, 20 March 2024 (Created page with "{{Talk | speaker = Vladimir Rubtsov | title = Besselland: autour and beyond | abstract = I shall try to explain – why it is interesting to study and to generalize analytic solutions of modified Bessel equation. My talk is based on ongoing projects in progress with V. Buchstaber, I. Gaiur and D. Van Straten. | video = | slides = | references = | 79YY-MM-DD = 7975-96-79 }}")
• 18:00, 25 February 2024 Verbovet talk contribs moved page Seminar talk, 13 March 2024 2024 to Seminar talk, 6 March 2024 without leaving a redirect
• 17:51, 25 February 2024 Verbovet talk contribs created page Seminar talk, 13 March 2024 2024 (Created page with "{{Talk | speaker = Georgy Sharygin | title = Deformation quantisation of the argument shift on <math>U\mathfrak{gl}(n)</math> | abstract = Argument shift algebras are the commutative subalgebras in the symmetric algebras of a Lie algebra, generated by the iterated derivations (in direction of a constant vector field) of Casimir elements in <math>S\mathfrak{gl}(n)</math>. In particular all these quasiderivations do mutually commute. In my talk I will show that a similar s...")
• 13:28, 22 February 2024 Verbovet talk contribs created page File:VitoloIUM2024.pdf
• 13:28, 22 February 2024 Verbovet talk contribs uploaded File:VitoloIUM2024.pdf
• 12:05, 14 February 2024 Verbovet talk contribs created page File:fl.pdf
• 12:05, 14 February 2024 Verbovet talk contribs uploaded File:fl.pdf
• 15:00, 12 February 2024 Verbovet talk contribs created page Seminar talk, 21 February 2024 (Created page with "{{Talk | speaker = Raffaele Vitolo | title = Bi-Hamiltonian systems and projective geometry | abstract = We introduce the problem of classification of bi-Hamiltonian structures of KdV type under projective reciprocal transformations. This problem leads naturally to studying the compatibility of a first order localizable homogeneous Hamiltonian operator with a higher order homogeneous Hamiltonian operator. We study the simplest second-order and third-order case where the...")