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Author Iwasaki, Katsunori. author From Gauss to Painlevรฉ [electronic resource] : A Modern Theory of Special Functions / by Katsunori Iwasaki, Hironobu Kimura, Shun Shimomura, Masaaki Yoshida Wiesbaden : Vieweg+Teubner Verlag, 1991 http://dx.doi.org/10.1007/978-3-322-90163-7 XII, 347p. online resource

SUMMARY

Preface The Gamma function, the zeta function, the theta function, the hyperยญ geometric function, the Bessel function, the Hermite function and the Airy function, . . . are instances of what one calls special functions. These have been studied in great detail. Each of them is brought to light at the right epoch according to both mathematicians and physicists. Note that except for the first three, each of these functions is a solution of a linear ordinary differential equation with rational coefficients which has the same name as the functions. For example, the Bessel equation is the simplest non-trivial linear ordinary differential equation with an irregยญ ular singularity which leads to the theory of asymptotic expansion, and the Bessel function is used to describe the motion of planets (Kepler's equation). Many specialists believe that during the 21st century the Painleve functions will become new members of the community of special funcยญ tions. For any case, mathematics and physics nowadays already need these functions. The corresponding differential equations are non-linear ordinary differential equations found by P. Painleve in 1900 fqr purely mathematical reasons. It was only 70 years later that they were used in physics in order to describe the correlation function of the two dimenยญ sional Ising model. During the last 15 years, more and more people have become interested in these equations, and nice algebraic, geometric and analytic properties were found

CONTENT

1. Elements of Differential Equations -- 1.1 Cauchyโ{128}{153}s existence theorem -- 1.2 Linear equations -- 1.3 Local behavior around regular singularities (Frobeniusโ{128}{153}s method) -- 1.4 Fuchsian equations -- 1.5 Pfaffian systems and integrability conditions -- 1.6 Hamiltonian systems -- 2. The Hypergeometric Differential Equation -- 2.1 Definition and basic facts -- 2.2 Contiguity relations -- 2.3 Integral representations -- 2.4 Monodromy of the hypergeometrie equation -- 3. Monodromy-Preserving Deformation, Painlevรฉ Equations and Garnier Systems -- 3.1 Painlevรฉ equations -- 3.2 The Riemann-Hilbert problem for second order linear differential equations -- 3.3 Monodromy-preserving deformations -- 3.4 The Garnier system

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