In this paper we show that generic Painlevé equations from different families are orthogonal. In particular, this means that there are no general Backlund transformations between Painlevé equations from the different families $P_I-P_{VI}$ .
Rank three representations of Painlevé systems: II. de Rham structure, Fourier--Laplace transformation
Budapest University of Technology and Economics(布达佩斯技术与经济大学);Eötvös Loránd University(罗兰大学);HUN-REN Alfréd Rényi Institute of Mathematics(匈牙利研究与教育网络阿尔弗雷德·雷尼数学研究所)
Folding transformation of the Painlevé equations is an algebraic (of degree greater than 1) transformation between solutions of different equations. In 2005 Tsuda, Okamoto and Sakai classified folding transformations of differential Painlevé equations. These transformations are in correspondence with automorphisms of affine Dynkin diagrams. We give a complete classification of folding transformations of the $q$-difference Painlevé equations, these transformations are in correspondence with certain subdiagrams of the affine Dynkin diagrams (possibly with automorphism). The method is based on Sa…
Since the classification of discrete Painlevé equations in terms of rational surfaces, there has been much interest in the range of integrable equations arising from each of the 22 surface types in Sakai's list. For all but the most degenerate type in the list, the surfaces come in families which admit affine Weyl groups of symmetries. Translation elements of this symmetry group define discrete Painlevé equations with the same number of parameters as their family of surfaces. While non-translation elements of the symmetry group have been observed to correspond to discrete systems of Painlevé-t…
Poncelet pairs of a circle and parabolas from a confocal family and Painlevé VI equations
The University of Texas at Dallas(德克萨斯大学达拉斯分校);Mathematical Institute SANU, Belgrade, Serbia(塞尔维亚贝尔格莱德数学研究所);BRAC University, Dhaka, Bangladesh(孟加拉国达卡布拉格大学)