Zobrazeno 1 - 10
of 28
pro vyhledávání: '"Tamás Lengyel"'
Publikováno v:
Applied Sciences, Vol 11, Iss 20, p 9681 (2021)
Hydraulic fracturing is a well-known production intensification technique in the petroleum industry that aims to enhance the productivity of a well drilled mostly in less permeable reservoirs. The process’s effectiveness depends on the achieved fra
Externí odkaz:
https://doaj.org/article/addeb7acba8141268df972a8c3b0883b
Autor:
Tamás Lengyel
Publikováno v:
Discrete Mathematics & Theoretical Computer Science, Vol DMTCS Proceedings vol. AK,..., Iss Proceedings (2009)
Let $n$ and $k$ be positive integers, $d(k)$ and $\nu_2(k)$ denote the number of ones in the binary representation of $k$ and the highest power of two dividing $k$, respectively. De Wannemacker recently proved for the Stirling numbers of the second k
Externí odkaz:
https://doaj.org/article/041384e71a364810ac5e140496d275c8
Autor:
Attila Varga, Tamás Lengyel
Publikováno v:
Mérnöki és Informatikai Megoldások. :5-11
A hidraulikus rétegrepesztés egy rétegkezelő eljárás, melynek célja, hogy az alacsony hozammal rendelkező kutak produktivitását megnövelje. A szivattyúzás megszűnése után, a rétegnyomásnak megfelelően a repedés újra összezár, e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a780b634e54bed68397020c68319af49
https://doi.org/10.37775/eis.2021.1.1
https://doi.org/10.37775/eis.2021.1.1
Autor:
Tamás Lengyel
Publikováno v:
International Journal of Number Theory. 14:2155-2164
Let [Formula: see text] with [Formula: see text] and [Formula: see text] be an odd prime. We find a supercongruence for [Formula: see text] and related sums of powers of binomial coefficients. These results complement prior results for [Formula: see
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::10c3846946ccda15e06dbc1234e61a42
https://doi.org/10.1142/s1793042118501294
https://doi.org/10.1142/s1793042118501294
Publikováno v:
Applied Sciences
Volume 11
Issue 20
Applied Sciences, Vol 11, Iss 9681, p 9681 (2021)
Volume 11
Issue 20
Applied Sciences, Vol 11, Iss 9681, p 9681 (2021)
Hydraulic fracturing is a well-known production intensification technique in the petroleum industry that aims to enhance the productivity of a well drilled mostly in less permeable reservoirs. The process’s effectiveness depends on the achieved fra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c9edab3f38dc3691de8c42bac7f7bc70
https://doi.org/10.3390/app11209681
https://doi.org/10.3390/app11209681
Autor:
Tamás Lengyel
Publikováno v:
International Journal of Number Theory. 13:2381-2392
Let [Formula: see text] be an even integer and [Formula: see text] be an odd prime. We study Franel-like sums and alternating sums, as well as lacunary sums of [Formula: see text]th powers of binomial coefficients from the point of view of arithmetic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d2591b8c28190c60f370a2fe829ec97
https://doi.org/10.1142/s1793042117501305
https://doi.org/10.1142/s1793042117501305
Autor:
Tamás Lengyel
Publikováno v:
International Journal of Number Theory. 13:2075-2091
Let [Formula: see text] be an integer and [Formula: see text] be an odd prime. We study sums and lacunary sums of [Formula: see text]th powers of binomial coefficients from the point of view of arithmetic properties. We develop new congruences and pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::38fbd78d0c6f4d035d3ce0d9542f0ab8
https://doi.org/10.1142/s1793042117501111
https://doi.org/10.1142/s1793042117501111
Autor:
Tamás Lengyel
Publikováno v:
Journal of Number Theory. 148:73-94
The goal of this paper is to describe s ( n , k ) mod p e and calculate ν p ( s ( n , k ) ) for a prime p, fixed integer k ≥ 1 , and large enough e and n. Some special cases of the form s ( a p n , k ) mod p e and its relation to s ( a p n + 1 , k
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::47c1795bef74f9e906de05629839d4cf
https://doi.org/10.1016/j.jnt.2014.09.015
https://doi.org/10.1016/j.jnt.2014.09.015
Autor:
Tamás Lengyel
Publikováno v:
International Journal of Number Theory. 10:653-667
For any prime p, we establish congruences modulo pn+1 for the difference of the pn+1 th and pn th Motzkin numbers and determine the p-adic order of the difference. The results confirm recent conjectures on the order. The applied techniques involve th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::85088577c3b8ea3c3e56a3f44bb1089d
https://doi.org/10.1142/s1793042113501157
https://doi.org/10.1142/s1793042113501157
Autor:
Tamás Lengyel
Publikováno v:
Statistics & Probability Letters. 81:1476-1481
We use only the classic basic ballot result and simple combinatorial arguments to derive the distributions of the first passage time and the number of visits in the usual random walk model.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::efb3753fa5e7ab131a1b216edd8dcce7
https://doi.org/10.1016/j.spl.2011.05.011
https://doi.org/10.1016/j.spl.2011.05.011