Discriminantly separable polynomials and quad-equations

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September 2014, 6(3): 319-333. doi: 10.3934/jgm.2014.6.319

Discriminantly separable polynomials and quad-equations

Vladimir Dragović ^1, and Katarina Kukić ^2,

1.	The Department of Mathematical Sciences, University of Texas at Dallas, 800 West Campbell Road, Richardson TX 75080, United States
2.	Faculty for Traffic and Transport Engineering, University of Belgrade, Vojvode Stepe 305, 11000 Belgrade, Serbia

Received April 2013 Revised July 2014 Published September 2014

Abstract
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We classify the discriminantly separable polynomials of degree two in each of three variables, defined by a property that all the discriminants as polynomials of two variables are factorized as products of two polynomials of one variable each. Our classification is based on the study of structures of zeros of a polynomial component $P$ of a discriminant. This classification is related to the classification of pencils of conics in a delicate way. We establish a relationship between our classification and the classification of integrable quad-equations which has been suggested recently by Adler, Bobenko, and Suris.

Keywords: pencils of conics, integrable quad-equations, two-valued groups., Möbius transformations, Discriminantly separable polynomials.

Mathematics Subject Classification: Primary: 37K60; Secondary: 14N05, 37K2.

Citation: Vladimir Dragović, Katarina Kukić. Discriminantly separable polynomials and quad-equations. Journal of Geometric Mechanics, 2014, 6 (3) : 319-333. doi: 10.3934/jgm.2014.6.319

References:

[1]	V. E. Adler, A. I. Bobenko and Y. B. Suris, Classification of integrable equations on quad-graphs. The consistency approach,, Commun. Math. Phys., 233 (2003), 513. Google Scholar
[2]	V. E. Adler, A. I. Bobenko and Y. B. Suris, Discrete nonlinear hiperbolic equations. Classification of integrable cases,, Funct. Anal. Appl, 43 (2009), 3. doi: 10.1007/s10688-009-0002-5. Google Scholar
[3]	V. E. Adler, A. I. Bobenko and Yu. B. Suris, Geometry of Yang-Baxter maps: Pencils of conics and quadrirational mappings,, Comm. Anal. Geom., 12 (2004), 967. doi: 10.4310/CAG.2004.v12.n5.a1. Google Scholar
[4]	A. I. Bobenko and Yu. B. Suris, Integrable noncommutative equations on quad-graphs. The consistency approach,, Lett. Math. Phys., 61 (2002), 241. doi: 10.1023/A:1021249131979. Google Scholar
[5]	A. I. Bobenko and Yu. B. Suris, Integrable systems on quad-graphs,, Int. Math. Res. Not., (2002), 573. doi: 10.1155/S1073792802110075. Google Scholar
[6]	V. Buchstaber, n-valued groups: Theory and applications,, Moscow Mathematical Journal, 6 (2006), 57. Google Scholar
[7]	V. M. Buchstaber, Functional equations, associated with addition theorems for elliptic functions, and two-valued algebraic groups,, Russian Math. Surv., 45 (1990), 213. doi: 10.1070/RM1990v045n03ABEH002361. Google Scholar
[8]	V. M. Buchstaber and V. Dragović, Two-valued groups, Kummer varieties and integrable billiards,, preprint, (). Google Scholar
[9]	V. M. Buchstaber and S. P. Novikov, Formal groups, power systems and Adams operators,, Mat. Sb. (N. S), 84(126) (1971), 81. Google Scholar
[10]	V. M. Buchstaber and A. P. Veselov, Integrable correspondences and algebraic representations of multivalued groups,, Internat. Math. Res. Notices, 8 (1996), 381. doi: 10.1155/S1073792896000256. Google Scholar
[11]	G. Darboux, Principes de Géométrie Analytique,, Gauthier-Villars, (1917). Google Scholar
[12]	V. Dragović, Poncelet-Darboux curves, their complete decomposition and Marden theorem,, Int. Math. Res. Notes, 2011 (2011), 3502. doi: 10.1093/imrn/rnq229. Google Scholar
[13]	V. Dragović, Generalization and geometrization of the Kowalevski top,, Communications in Math. Phys., 298 (2010), 37. doi: 10.1007/s00220-010-1066-z. Google Scholar
[14]	V. Dragović and K. Kukić, New examples of systems of the Kowalevski type,, Regular and Chaotic Dynamics, 16 (2011), 484. doi: 10.1134/S1560354711050054. Google Scholar
[15]	V. Dragović and K. Kukić, Systems of the Kowalevski type and discriminantly separable polynomials,, Regular and Chaotic Dynamics, 19 (2014), 162. doi: 10.1134/S1560354714020026. Google Scholar
[16]	V. Dragović and M. Radnović, Poncelet Porisms and Beyond,, Springer, (2011). doi: 10.1007/978-3-0348-0015-0. Google Scholar
[17]	V. Dragović and M. Radnović, Billiard algebra, integrable line congruences and DR-nets,, J. Nonlinear Mathematical Physics, 19 (2012). doi: 10.1142/S1402925112500192. Google Scholar
[18]	V. V. Golubev, Lectures on the Integration of Motion of a Heavy Rigid Body Around a Fixed Point,, Gostechizdat, (1953). Google Scholar
[19]	S. Kowalevski, Sur la probleme de la rotation d'un corps solide autour d'un point fixe,, Acta Math., 12 (1889), 177. doi: 10.1007/BF02592182. Google Scholar
[20]	J. G. Semple and G. T. Kneebone, Algebraic Projective Geometry,, Clarendon Press, (1998). Google Scholar

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References:

[1]	V. E. Adler, A. I. Bobenko and Y. B. Suris, Classification of integrable equations on quad-graphs. The consistency approach,, Commun. Math. Phys., 233 (2003), 513. Google Scholar
[2]	V. E. Adler, A. I. Bobenko and Y. B. Suris, Discrete nonlinear hiperbolic equations. Classification of integrable cases,, Funct. Anal. Appl, 43 (2009), 3. doi: 10.1007/s10688-009-0002-5. Google Scholar
[3]	V. E. Adler, A. I. Bobenko and Yu. B. Suris, Geometry of Yang-Baxter maps: Pencils of conics and quadrirational mappings,, Comm. Anal. Geom., 12 (2004), 967. doi: 10.4310/CAG.2004.v12.n5.a1. Google Scholar
[4]	A. I. Bobenko and Yu. B. Suris, Integrable noncommutative equations on quad-graphs. The consistency approach,, Lett. Math. Phys., 61 (2002), 241. doi: 10.1023/A:1021249131979. Google Scholar
[5]	A. I. Bobenko and Yu. B. Suris, Integrable systems on quad-graphs,, Int. Math. Res. Not., (2002), 573. doi: 10.1155/S1073792802110075. Google Scholar
[6]	V. Buchstaber, n-valued groups: Theory and applications,, Moscow Mathematical Journal, 6 (2006), 57. Google Scholar
[7]	V. M. Buchstaber, Functional equations, associated with addition theorems for elliptic functions, and two-valued algebraic groups,, Russian Math. Surv., 45 (1990), 213. doi: 10.1070/RM1990v045n03ABEH002361. Google Scholar
[8]	V. M. Buchstaber and V. Dragović, Two-valued groups, Kummer varieties and integrable billiards,, preprint, (). Google Scholar
[9]	V. M. Buchstaber and S. P. Novikov, Formal groups, power systems and Adams operators,, Mat. Sb. (N. S), 84(126) (1971), 81. Google Scholar
[10]	V. M. Buchstaber and A. P. Veselov, Integrable correspondences and algebraic representations of multivalued groups,, Internat. Math. Res. Notices, 8 (1996), 381. doi: 10.1155/S1073792896000256. Google Scholar
[11]	G. Darboux, Principes de Géométrie Analytique,, Gauthier-Villars, (1917). Google Scholar
[12]	V. Dragović, Poncelet-Darboux curves, their complete decomposition and Marden theorem,, Int. Math. Res. Notes, 2011 (2011), 3502. doi: 10.1093/imrn/rnq229. Google Scholar
[13]	V. Dragović, Generalization and geometrization of the Kowalevski top,, Communications in Math. Phys., 298 (2010), 37. doi: 10.1007/s00220-010-1066-z. Google Scholar
[14]	V. Dragović and K. Kukić, New examples of systems of the Kowalevski type,, Regular and Chaotic Dynamics, 16 (2011), 484. doi: 10.1134/S1560354711050054. Google Scholar
[15]	V. Dragović and K. Kukić, Systems of the Kowalevski type and discriminantly separable polynomials,, Regular and Chaotic Dynamics, 19 (2014), 162. doi: 10.1134/S1560354714020026. Google Scholar
[16]	V. Dragović and M. Radnović, Poncelet Porisms and Beyond,, Springer, (2011). doi: 10.1007/978-3-0348-0015-0. Google Scholar
[17]	V. Dragović and M. Radnović, Billiard algebra, integrable line congruences and DR-nets,, J. Nonlinear Mathematical Physics, 19 (2012). doi: 10.1142/S1402925112500192. Google Scholar
[18]	V. V. Golubev, Lectures on the Integration of Motion of a Heavy Rigid Body Around a Fixed Point,, Gostechizdat, (1953). Google Scholar
[19]	S. Kowalevski, Sur la probleme de la rotation d'un corps solide autour d'un point fixe,, Acta Math., 12 (1889), 177. doi: 10.1007/BF02592182. Google Scholar
[20]	J. G. Semple and G. T. Kneebone, Algebraic Projective Geometry,, Clarendon Press, (1998). Google Scholar

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