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    Reduced Differential Transform Method for (2+1) Dimensional type of the Zakharov-Kuznetsov ZK(n,n) Equations

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    In this paper, reduced differential transform method (RDTM) is employed to approximate the solutions of (2+1) dimensional type of the Zakharov-Kuznetsov partial differential equations. We apply these method to two examples. Thus, we have obtained numerical solution partial differential equations of Zakharov-Kuznetsov. These examples are prepared to show the efficiency and simplicity of the method

    Bifurcation of Fredholm maps I; Index bundle and bifurcation

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    Bifurcation of Fredholm Maps I; The Index Bundle and Bifurcation

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    We associate to a parametrized family ff of nonlinear Fredholm maps possessing a trivial branch of zeroes an {\it index of bifurcation} Ī²(f)\beta(f) which provides an algebraic measure for the number of bifurcation points from the trivial branch. The index Ī²(f)\beta(f) is derived from the index bundle of the linearization of the family along the trivial branch by means of the generalized JJ-homomorphism. Using the Agranovich reduction and a cohomological form of the Atiyah-Singer family index theorem, due to Fedosov, we compute the bifurcation index of a multiparameter family of nonlinear elliptic boundary value problems from the principal symbol of the linearization along the trivial branch. In this way we obtain criteria for bifurcation of solutions of nonlinear elliptic equations which cannot be achieved using the classical Lyapunov-Schmidt method.Comment: 42 pages. Changes: added Lemma 2.31 and a reference + minor corrections. To appear on TMN
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