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Fundamentalnaya i Prikladnaya Matematika, 2013, Volume 18, Issue 6, Pages 161–170
(Mi fpm1559)
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This article is cited in 1 scientific paper (total in 1 paper)
Chebyshev polynomials, Zolotarev polynomials, and plane trees
Yu. Yu. Kochetkov National Research University "Higher School of Economics", Moscow, Russia
Abstract:
A polynomial with exactly two critical values is called a generalized Chebyshev polynomial (or Shabat polynomial). A polynomial with exactly three critical values is called a Zolotarev polynomial. Two Chebyshev polynomials $f$ and $g$ are called $\mathrm Z$-homotopic if there exists a family $p_\alpha$, $\alpha\in[0,1]$, where $p_0=f$, $p_1=g$, and $p_\alpha$ is a Zolotarev polynomial if $\alpha\in(0,1)$. As each Chebyshev polynomial defines a plane tree (and vice versa), $\mathrm Z$-homotopy can be defined for plane trees. In this work, we prove some necessary geometric conditions for the existence of $\mathrm Z$-homotopy of plane trees, describe $\mathrm Z$-homotopy for trees with five and six edges, and study one interesting example in the class of trees with seven edges.
Citation:
Yu. Yu. Kochetkov, “Chebyshev polynomials, Zolotarev polynomials, and plane trees”, Fundam. Prikl. Mat., 18:6 (2013), 161–170; J. Math. Sci., 209:2 (2015), 275–281
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https://www.mathnet.ru/eng/fpm1559 https://www.mathnet.ru/eng/fpm/v18/i6/p161
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Abstract page: | 299 | Full-text PDF : | 232 | References: | 44 |
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