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Sibirskii Matematicheskii Zhurnal, 2015, Volume 56, Number 2, Pages 409–419
(Mi smj2646)
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This article is cited in 1 scientific paper (total in 1 paper)
The monodromy of a general algebraic function
E. N. Mikhalkin Siberian Federal University, Krasnoyarsk, Russia
Abstract:
We consider a general reduced algebraic equation of degree $n$ with complex coefficients. The solution to this equation, a multifunction, is called a general algebraic function. In the coefficient space we consider the discriminant set $\nabla$ of the equation and choose in its complement the maximal polydisk domain $D$ containing the origin. We describe the monodromy of the general algebraic function in a neighborhood of $D$. In particular, we prove that $\&nabla$ intersects the boundary $\partial D$ along $n$ real algebraic surfaces $\mathscr S^{(j)}$ of dimension $n-2$. Furthermore, every branch $y_j(x)$ of the general algebraic function ramifies in $D$ only along the pair of surfaces $\mathscr S^{(j)}$ and $\mathscr S^{(j-1)}$.
Keywords:
algebraic equation, hypergeometric function, discriminant, integral representation, monodromy.
Received: 18.07.2014
Citation:
E. N. Mikhalkin, “The monodromy of a general algebraic function”, Sibirsk. Mat. Zh., 56:2 (2015), 409–419; Siberian Math. J., 56:2 (2015), 330–338
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https://www.mathnet.ru/eng/smj2646 https://www.mathnet.ru/eng/smj/v56/i2/p409
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Abstract page: | 466 | Full-text PDF : | 133 | References: | 48 | First page: | 10 |
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