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Problemy Peredachi Informatsii, 2017, Volume 53, Issue 3, Pages 84–89
(Mi ppi2246)
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This article is cited in 4 scientific papers (total in 4 papers)
Large Systems
On projectively invariant points of an oval with a distinguished exterior line
A. M. Balitskiiab, A. V. Savchika, R. F. Gafarovc, I. A. Konovalenkoa a Kharkevich Institute for Information Transmission Problems,
Russian Academy of Sciences, Moscow, Russia
b Moscow Institute of Physics and Technology (State University), Moscow, Russia
c Innopolis University, Innopolis, Republic of Tatarstan, Russia
Abstract:
We consider projectively invariant points of an oval with a distinguished exterior line. For this, we introduce a projectively invariant transformation of the line parametrized by the oval. Projectively invariant points are defined as fixed points of this transformation applied twice. We prove that there are at least four such points. For the proof we reduce the problem to an affine problem and construct an extremal area parallelogram circumscribed around the oval.
Received: 11.11.2016 Revised: 26.01.2017
Citation:
A. M. Balitskii, A. V. Savchik, R. F. Gafarov, I. A. Konovalenko, “On projectively invariant points of an oval with a distinguished exterior line”, Probl. Peredachi Inf., 53:3 (2017), 84–89; Problems Inform. Transmission, 53:3 (2017), 279–283
Linking options:
https://www.mathnet.ru/eng/ppi2246 https://www.mathnet.ru/eng/ppi/v53/i3/p84
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