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Ufa Mathematical Journal, 2017, Volume 9, Issue 4, Pages 127–134
DOI: https://doi.org/10.13108/2017-9-4-127
(Mi ufa403)
 

This article is cited in 1 scientific paper (total in 1 paper)

Quasi-elliptic functions

A. Ya. Khrystiyanyn, Dz. V. Lukivska

Ivan Franko National University of Lviv, Universytetska str., 1, 79000, Lviv, Ukraine
References:
Abstract: We study certain generalizations of elliptic functions, namely quasi-elliptic functions.
Let $p = e^{i\alpha},$ $q = e^{i\beta},$ $\alpha,\, \beta \in \mathbb{R}.$ A meromorphic in $\mathbb{C}$ function $g$ is called quasi-elliptic if there exist $\omega_1, \omega_2 \in \mathbb{C}^{*},$ $\mathrm{Im} \frac{\omega_2}{\omega_1} > 0,$ such that $g(u+\omega_1)=pg(u)$, $g(u+\omega_2)=qg(u)$ for each $u\in\mathbb{C}$. In the case $\alpha = \beta = 0 \mod 2\pi$ this is a classical theory of elliptic functions. A class of quasi-elliptic functions is denoted by $\mathcal{QE}.$ We show that the class $\mathcal{QE}$ is nontrivial. For this class of functions we construct analogues $\wp_{\alpha \beta}$, $\zeta_{\alpha \beta}$ of $\wp$ and $\zeta$ Weierstrass functions. Moreover, these analogues are in fact the generalizations of the classical $\wp$ and $\zeta$ functions in such a way that the latter can be found among the former by letting $\alpha=0$ and $\beta=0$. We also study an analogue of the Weierstrass $\sigma$ function and establish connections between this function and $\wp_{\alpha \beta}$ as well as $\zeta_{\alpha \beta}$.
Let $q, p \in\mathbb{C}^*,$ $|q|<1.$ A meromorphic in $\mathbb{C^{*}}$ function $f$ is said to be $p$-loxodromic of multiplicator $q$ if for each $z \in \mathbb{C}^{*}$ $f(qz) = pf(z).$ We obtain telations between quasi-elliptic and $p$-loxodromic functions.
Keywords: quasi-elliptic function, the Weierstrass $\wp$-function, the Weierstrass $\zeta$-function, the Weierstrass $\sigma$-function, $p$-loxodromic function.
Received: 27.09.2016
Russian version:
Ufimskii Matematicheskii Zhurnal, 2017, Volume 9, Issue 4, Pages 129–136
Bibliographic databases:
Document Type: Article
UDC: 517.53
MSC: 30D30
Language: English
Original paper language: English
Citation: A. Ya. Khrystiyanyn, Dz. V. Lukivska, “Quasi-elliptic functions”, Ufimsk. Mat. Zh., 9:4 (2017), 129–136; Ufa Math. J., 9:4 (2017), 127–134
Citation in format AMSBIB
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\paper Quasi-elliptic functions
\jour Ufimsk. Mat. Zh.
\yr 2017
\vol 9
\issue 4
\pages 129--136
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\jour Ufa Math. J.
\yr 2017
\vol 9
\issue 4
\pages 127--134
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  • This publication is cited in the following 1 articles:
    Citing articles in Google Scholar: Russian citations, English citations
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