integrable nonlinear partial differential and differential-difference equations; classification of integrable equations; higher (generalized) symmetries and conservation laws; Hamiltonian and Lagrangian structure; transformation theory for integrable equations; Miura, Backlund and Schlesinger tranformations.
UDC:
517.9
Subject:
The classification problem has been solved for classes of integrable (more precisely, possessing an infinite hierarchy of higher symmetries and conservation laws) equations including the differential-difference Volterra and Toda equations and also (with A. B. Shabat and A. V. Mikhailov) for a class which contains the nonlinear Schrodinger equation. The notion of a quasi-local function has been introduced (with A. V. Mikhailov) which has allowed to generalize the Symmetry Approach to the classification of integrable equations for the case of 1+2 dimensional equations. A number of papers is devoted to the transformation theory for integrable equations. In particular, a scheme of the construction of modified equations together with corresponding Miura transformations has been presented which does not use $L-A$ pairs, but only uses Miura transformations.
Main publications:
D. Levi, R. I. Yamilov, “The generalized symmetry method for discrete equations”, J. Phys. A, Math. Theor., 42:45 (2009), 18 , IOP Publishing, Bristol
R. Yamilov, “Symmetries as integrability criteria for differential difference equations”, J. Phys. A, Math. Gen., 39:45 (2006), r541–r623 , IOP Publishing Ltd., Bristol, UK
V. E. Adler, A. B. Shabat, R. I. Yamilov, “Symmetry approach to the integrability problem”, Theoret. and Math. Phys., 125:3 (2000), 1603–1661
A. V. Mikhajlov, A. B. Shabat, R. I. Yamilov, “Extension of the module of invertible transformations. Classification of integrable systems”, Commun. Math. Phys., 115:1 (1988), 1–19 , Springer, Berlin/Heidelberg
A. V. Mikhailov, A. B. Shabat, R. I. Yamilov, “The symmetry approach to the classification of non-linear equations. Complete lists of integrable systems”, Russian Math. Surveys, 42:4 (1987), 1–63
R. N. Garifullin, R. I. Yamilov, “Modified series of integrable discrete equations on a quadratic lattice with a nonstandard symmetry structure”, Theoret. and Math. Phys., 205:1 (2020), 1265–1279
2019
2.
R. N. Garifullin, R. I. Yamilov, “An unusual series of autonomous discrete integrable equations on a square lattice”, Theoret. and Math. Phys., 200:1 (2019), 966–984
3.
R. N. Garifullin, G. Gubbiotti, R. I. Yamilov, “Integrable discrete autonomous quad-equations admitting, as generalized symmetries, known five-point differential-difference equations”, Journal of Nonlinear Mathematical Physics, 26:3 (2019), 333-357 , arXiv: 1810.11184
R. N. Garifullin , R. I. Yamilov, “On series of Darboux integrable discrete equations on square lattice”, Ufa Math. J., 11:3 (2019), 99–108
2018
6.
R. N. Garifullin, R. I. Yamilov and D. Levi, “Classification of five-point differential-difference equations II”, J. Phys. A: Math. Theor, 51:6 (2018), 065204 , 16 pp.
Giorgio Gubbiotti, Christian Scimiterna, Ravil I. Yamilov, “Darboux Integrability of Trapezoidal $H^{4}$ and $H^{6}$ Families of Lattice Equations II: General Solutions”, SIGMA, 14 (2018), 8 , 51 pp.
R. N. Garifullin, R. I. Yamilov, “On the Integrability of a Lattice Equation with Two Continuum Limits”, J. Math. Sci. (N. Y.), 252:2 (2021), 283–289
2017
9.
R. N. Garifullin, R. I. Yamilov, D. Levi, “Classification of five-point differential-difference equations”, J. Phys. A, Math. Theor., 50:12 (2017), 125201 (27pp)
G. Gubbiotti, R. I. Yamilov, “Darboux integrability of trapezoidal $H^4$ and $H^4$ families of lattice equations I: first integrals”, J. Phys. A: Math. Theor., 50:34 (2017), 345205 , 26 pp.
R. N. Garifullin, R. I. Yamilov, “On integrability of a discrete analogue of Kaup–Kupershmidt equation”, Ufa Math. Journal, 9:3 (2017), 158–164
2016
12.
R. N. Garifullin, R. I. Yamilov, D. Levi, “Non-invertible transformations of differential-difference equations”, J. Phys. A, Math. Theor., 49:37 (2016), 23 pp , IOP Publishing, Bristol
R. N. Garifullin, R. I. Yamilov, “Integrable discrete nonautonomous quad-equations as Bäcklund auto-transformations for known Volterra and Toda type semidiscrete equations”, Journal of Physics: Conference Series, 621:1 (2015), 012005
R. N. Garifullin, I. T. Habibullin, R. I. Yamilov, “Peculiar symmetry structure of some known discrete nonautonomous equations”, J. Phys. A, Math. Theor., 48:23 (2015), 27 , IOP Publishing, Bristol
R. N. Garifullin, A. V. Mikhailov, R. I. Yamilov, “Discrete equation on a square lattice with a nonstandard structure of generalized symmetries”, Theoret. and Math. Phys., 180:1 (2014), 765–780
2012
16.
R. N. Garifullin, R. I. Yamilov, “Examples of Darboux integrable discrete equations possessing first integrals of an arbitrarily high minimal order”, Ufimsk. matem. zhurn., 4:3 (2012), 177–183
R. N. Garifullin, R. I. Yamilov, “Generalized symmetry classification of discrete equations of a class depending on twelve parameters”, J. Phys. A, Math. Theor., 45:34 (2012), 23 , IOP Publishing, Bristol
Decio Levi, Pavel Winternitz, Ravil I. Yamilov, “Symmetries of the Continuous and Discrete Krichever–Novikov Equation”, SIGMA, 7 (2011), 97 , 16 pp., arXiv: 1110.5021
D. Levi, R. I. Yamilov, “Generalized Lie symmetries for difference equations”, Symmetries and integrability of difference equations. Based upon lectures delivered during the summer school, Montreal, Canada, June 8–21, 2008, Cambridge: Cambridge University Press, 2011, 160–190
20.
D. Levi, R. I. Yamilov, “Generalized symmetry integrability test for discrete equations on the square lattice”, J. Phys. A, Math. Theor., 44:14 (2011), 22 , IOP Publishing, Bristol
D. Levi, R. I. Yamilov, “Integrability test for discrete equations via generalized symmetries”, Aip Conference Proceedings, 1323, no. 1, AMER INST PHYSICS, 2010, 203
22.
D. Levi, P. Winternitz, R. I. Yamilov, “Lie point symmetries of differential-difference equations”, J. Phys. A, Math. Theor., 43:29 (2010), 14 , IOP Publishing, Bristol
R. I. Yamilov, “Integrability conditions for an analogue of the relativistic Toda chain”, Theoret. and Math. Phys., 151:1 (2007), 492–504
2006
27.
R. Yamilov, “Symmetries as integrability criteria for differential difference equations”, J. Phys. A, Math. Gen., 39:45 (2006), r541–r623 , IOP Publishing Ltd., Bristol, UK
R. I. Yamilov, “Relativistic Toda Chains and Schlesinger Transformations”, Theoret. and Math. Phys., 139:2 (2004), 623–635
29.
R. Yamilov, D. Levi, “Integrability conditions for $n$ and $t$ dependent dynamical lattice equations”, J. Nonlinear Math. Phys., 11:1 (2004), 75–101 , Taylor & Francis, Abingdon, Oxfordshire; Atlantis Press, Paris
D. Levi, R. Yamilov, “On the integrability of a new discrete nonlinear Schrödinger equation”, J. Phys. A, Math. Gen., 34:41 (2001), l553–l562 , IOP Publishing Ltd., Bristol, UK
D. Levi, R. Yamilov, “Conditions for the existence of higher symmetries and nonlinear evolutionary equations on the lattice”, Algebraic methods in physics. A symposium for the 60th birthdays of Ji\ví Patera and Pavel Winternitz. Centre de Recherches Mathématiques (CRM), Montréal, Canada, January 1997, Springer, New York, 2001, 135–148
2000
32.
V. E. Adler, A. B. Shabat, R. I. Yamilov, “Symmetry approach to the integrability problem”, Theoret. and Math. Phys., 125:3 (2000), 1603–1661
33.
D. Levi, R. Yamilov, “Non-point integrable symmetries for equations on the lattice”, J. Phys. A, Math. Gen., 33:26 (2000), 4809–4823 , IOP Publishing Ltd., Bristol, UK
D. Levi, R. Yamilov, “Dilation symmetries and equations on the lattice”, J. Phys. A, Math. Gen., 32:47 (1999), 8317–8323 , IOP Publishing Ltd., Bristol, UK
V. E. Adler, S. I. Svinolupov, R. I. Yamilov, “Multi-component Volterra and Toda type integrable equations”, Phys. Lett., A, 254:1–2 (1999), 24–36 , Elsevier (North-Holland), Amsterdam
A. V. Mikhailov, R. I. Yamilov, “Towards classification of $(2+1)$-dimensional integrable equations. Integrability conditions. I”, J. Phys. A, Math. Gen., 31:31 (1998), 6707–6715 , IOP Publishing Ltd., Bristol, UK
A. V. Mikhailov, R. I. Yamilov, “On integrable two-dimensional generalizations of nonlinear Schrödinger type equations”, Physics Letters, Section A: General, Atomic and Solid State Physics, 230:5–6 (1997), 295–300 , Elsevier (North-Holland), Amsterdam
A. B. Shabat, R. I. Yamilov, “To a transformation theory of two-dimensional integrable systems”, Phys. Lett., A, 227:1–2 (1997), 15–23 , Elsevier (North-Holland), Amsterdam
D. Levi, R. Yamilov, “Conditions for the existence of higher symmetries of evolutionary equations on the lattice”, J. Math. Phys., 38:12 (1997), 6648–6674 , American Institute of Physics (AIP), Woodbury, NY
I. T. Habibullin, V. V. Sokolov, R. I. Yamilov, “Multi-component integrable systems and nonassociative structures”, Nonlinear physics: theory and experiment. Nature, structure and properties of nonlinear phenomena. Proceedings of the workshop, Lecce, Italy, June 29–July 7, 1995, World Scientific, Singapore, 1996, 139–168
41.
I. Cherdantsev, R. Yamilov, “Local master symmetries of differential-difference equations”, Symmetries and integrability of difference equations. Papers from the workshop, May 22–29, 1994, Estérel, Canada, American Mathematical Society, Providence, RI, 1996, 51–61
1995
42.
I. Yu. Cherdantsev, R. I. Yamilov, “Master symmetries for differential-difference equations of the Volterra type”, Physica D, 87:1–4 (1995), 140–144 , Elsevier (North-Holland), Amsterdam
S. I. Svinolupov, R. I. Yamilov, “Explicit Bäcklund transformations for multifield Schrödinger equations. Jordan generalizations of the Toda chain”, Theoret. and Math. Phys., 98:2 (1994), 139–146
44.
R. I. Yamilov, “Construction scheme for discrete Miura transformations”, J. Phys. A, Math. Gen., 27:20 (1994), 6839–6851 , IOP Publishing Ltd., Bristol, UK
V. E. Adler, R. I. Yamilov, “Explicit auto-transformations of integrable chains”, J. Phys. A, Math. Gen., 27:2 (1994), 477–492 , IOP Publishing Ltd., Bristol, UK
A. N. Leznov, A. B. Shabat, R. I. Yamilov, “Canonical transformations generated by shifts in nonlinear lattices”, Phys. Lett. A, 174:5–6 (1993), 397–402
A. B. Shabat, R. I. Yamilov, “Symmetries of nonlinear lattices”, Leningrad Math. J., 2:2 (1991), 377–400
1990
50.
R. I. Yamilov, “Invertible changes of variables generated by Bäcklund transformations”, Theoret. and Math. Phys., 85:2 (1990), 1269–1275
1988
51.
A. V. Mikhajlov, A. B. Shabat, R. I. Yamilov, “Extension of the module of invertible transformations. Classification of integrable systems”, Commun. Math. Phys., 115:1 (1988), 1–19 , Springer, Berlin/Heidelberg
A. V. Mikhailov, A. B. Shabat, R. I. Yamilov, “The symmetry approach to the classification of non-linear equations. Complete lists of integrable systems”, Russian Math. Surveys, 42:4 (1987), 1–63
54.
A. V. Mikhajlov, A. B. Shabat, R. I. Yamilov, “On extending the module of invertible transformations”, Sov. Math., Dokl., 36:1 (1987), 60–63 , American Mathematical Society, Providence, RI
1988
55.
A. V. Mikhailov, A. B. Shabat, R. I. Yamilov, “On an extension of the module of invertible transformations”, Dokl. Math., 36:1 (1988), 60–63
1983
56.
S. I. Svinolupov, V. V. Sokolov, R. I. Yamilov, “On Bäcklund transformations for integrable evolution equations”, Sov. Math., Dokl., 28 (1983), 165–168 , American Mathematical Society, Providence, RI
57.
S. I. Svinolupov, V. V. Sokolov, R. I. Yamilov, “On Bäcklund transformations for integrable evolution equations”, Dokl. Akad. Nauk SSSR, 271:4 (1983), 802–805
1982
58.
R. I. Yamilov, “On the classification of discrete equations”, 1982, Integrable systems, Work Collect., Ufa 1982, 95-114 (1982).
1980
59.
R. I. Yamilov, “On conservation laws for the difference Korteweg-de Vries equation”, Din. Splosh. Sredy, 44 (1980), 164–173 , Russian Academy of Sciences - RAS (Rossiĭskaya Akademiya Nauk - RAN), Siberian Branch (Sibirskoe Otdelenie), Institute of Hydrodynamics named after M. A. Lavrent'eva (Institut Gidrodinamiki Im. M. A. Lavrent'eva), Novosibirsk
2020
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