Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Hejda, Tomáš"'
Autor:
Hejda, Tomáš
This thesis deals with the influence of microclimatic conditions (air temperature near tree/shrub top, temperature of the stem and root zone) on the wood phenology of trees (Picea abies) and shrubs (Pinus mugo) growing on the same site in the alpine
Externí odkaz:
http://www.nusl.cz/ntk/nusl-397126
Autor:
Hejda, Tomáš, Kala, Vítězslav
Publikováno v:
J. Number Theory 234 (2022), 140-152
A positive quadratic form is $(k,\ell)$-universal if it represents all the numbers $kx+\ell$ where $x$ is a non-negative integer, and almost $(k,\ell)$-universal if it represents all but finitely many of them. We prove that for any $k,\ell$ such that
Externí odkaz:
http://arxiv.org/abs/1906.02538
Autor:
Hejda, Tomáš, Kala, Vítězslav
Publikováno v:
In Journal of Number Theory May 2022 234:140-152
Autor:
Hejda, Tomáš, Kala, Vítězslav
Publikováno v:
Manuscripta Math. 163 (2020), 263-278
Let $K=\mathbb Q(\sqrt D)$ be a real quadratic field. We consider the additive semigroup $\mathcal O_K^+(+)$ of totally positive integers in $K$ and determine its generators (indecomposable integers) and relations; they can be nicely described in ter
Externí odkaz:
http://arxiv.org/abs/1706.09178
Autor:
Hejda, Tomáš
The purpose of this thesis is design an unconventional powertrain V-6 engine with cylinder opening lines offset 90 degrees and 30 degrees of crank pin offset. It is an analysis of the balance of the crank mechanism, proposed unbalance, build a model
Externí odkaz:
http://www.nusl.cz/ntk/nusl-229894
Autor:
Hejda, Tomáš
Let $\beta\in(1,2)$ be a Pisot unit and consider the symmetric $\beta$-expansions. We give a necessary and sufficient condition for the associated Rauzy fractals to form a tiling of the contractive hyperplane. For $\beta$ a $d$-Bonacci number, i.e.,
Externí odkaz:
http://arxiv.org/abs/1503.07744
Autor:
Hejda, Tomáš
The goal of the thesis is profiling signmaking as a part of commercial communication. Field of signmaking is present in marketing and time context. On one hand thesis presents theoretic fundamentals, on the other side presents real executions and the
Externí odkaz:
http://www.nusl.cz/ntk/nusl-7496
Autor:
Hejda, Tomáš, Steiner, Wolfgang
Publikováno v:
Acta Arithmetica 183 (2018) , 35-51
We study rational numbers with purely periodic R\'enyi $\beta$-expansions. For bases $\beta$ satisfying $\beta^2=a\beta+b$ with $b$ dividing $a$, we give a necessary and sufficient condition for $\gamma(\beta)=1$, i.e., that all rational numbers $p/q
Externí odkaz:
http://arxiv.org/abs/1411.2419
Autor:
Hejda, Tomáš, Pelantová, Edita
For a real number $\beta>1$, Erd\H{o}s, Jo\'o and Komornik study distances between consecutive points in the set $X^m(\beta)=\bigl\{\sum_{j=0}^n a_j \beta^j : n\in\mathbb N,\,a_j\in\{0,1,\dots,m\}\bigr\}$. Pisot numbers play a crucial role for the pr
Externí odkaz:
http://arxiv.org/abs/1312.0653
Publikováno v:
9th International Conference, WORDS 2013, Turku : Finland (2013)
We study balancedness properties of words given by the Arnoux-Rauzy and Brun multi-dimensional continued fraction algorithms. We show that almost all Brun words on 3 letters and Arnoux-Rauzy words over arbitrary alphabets are finitely balanced; in pa
Externí odkaz:
http://arxiv.org/abs/1308.6694