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Teoreticheskaya i Matematicheskaya Fizika, 1994, Volume 101, Number 2, Pages 179–188
(Mi tmf1677)
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This article is cited in 1 scientific paper (total in 1 paper)
Numerical computations of integrals over paths on Riemann surfaces of genus $N$
J.-E. Lee National Chiao Tung University
Abstract:
This paper is a continuation of work by Forest and Lee [1,2]. In [1,2] it was proved that the function theory of periodic soliton solutions occurs on the Riemann surfaces $\Re$ of genus $N$, where the integrals over path on $\Re$ play the most fundamental role. In this paper a numerical method is developed to evaluate these integrals. Precisely, the aim is to develop a computational code for integrals of the form $$ \displaystyle \int _{\gamma }\,f(z)\frac {dz}{R(z)},\qquad \text {or}\qquad \displaystyle \int _{\gamma }\, f(z)R(z)\,dz,$$ where $f(z)$ is any single-valued analytic function on the complex plane $\mathbf C$, and $R(z)$ is two-valued function on $\mathbf C$ of the form $$ R^2(z)=\displaystyle \prod ^{2N+\delta }_{k=1}\,(z-z_0(k)),\qquad \delta =0\quad \text {or}\quad 1,$$ where $\bigl \{z_0(k),1\le k\le 2N+\delta \bigr \}$ are distinct complex numbers which play the role of the branch points of the Riemann surface $\Re =\bigl \{(z,R(z))\bigr \}$ of genus $N-1+\delta$. The integral path $\gamma$ is continuous on $\Re$. The numerical code is developed in “Mathematica” [3].
Received: 14.01.1994
Citation:
J.-E. Lee, “Numerical computations of integrals over paths on Riemann surfaces of genus $N$”, TMF, 101:2 (1994), 179–188; Theoret. and Math. Phys., 101:2 (1994), 1281–1288
Linking options:
https://www.mathnet.ru/eng/tmf1677 https://www.mathnet.ru/eng/tmf/v101/i2/p179
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