Abelian functions associated with a cyclic tetragonal curve of genus six

Details Abelian functions associated with a cyclic tetragonal curve of genus six Abelian functions associated with a cyclic tetragonal curve of genus six

2008-06-14

arxiv.org/abs/0806.2377v2

J. Phys. A: Math. Theor. 42 (2009) 095210.

Mathematics

Algebraic Geometry

31 pages. Version 2 with corrected typos, updated references, and improved structure of the paper

Scientific paper

10.1088/1751-8113/42/9/095210

We develop the theory of Abelian functions defined using a tetragonal curve of genus six, discussing in detail the cyclic curve $y^4 = x^5 + \lambda_4x^4 + \lambda_3x^3 + \lambda_2x^2 + \lambda_1x + \lambda_0$. We construct Abelian functions using the multivariate $\sigma$-function associated to the curve, generalising the theory of the Weierstrass $\wp$-function. We demonstrate that such functions can give a solution to the KP-equation, outlining how a general class of solutions could be generated using a wider class of curves. We also present the associated partial differential equations satisfied by the functions, the solution of the Jacobi Inversion Problem, a power series expansion for $\sigma(\bu)$ and a new addition formula.

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