Results 11 to 20 of about 4,113 (255)

Note on sunflowers [PDF]

open access: yesDiscrete Mathematics, 2021
3 pages; based on 2020 REU; minor edits; to appear in Discrete ...
Tolson Bell   +2 more
openaire   +2 more sources

Odd-sunflowers

open access: yesJournal of Combinatorial Theory, Series A, 2023
Extending the notion of sunflowers, we call a family of at least two sets an \emph{odd-sunflower} if every element of the underlying set is contained in an odd number of sets or in none of them. It follows from the Erd\H os--Szemer\'edi conjecture, recently proved by %Alweiss, Lovett, Wu, and Zhang, Naslund and Sawin, that there is a constant $\mu < ...
Frankl, Peter   +2 more
openaire   +6 more sources

INFLUENCE OF SHORT-TERM CROP ROTATIONS WITH DIFFERENT PROPORTIONS OF SUNFLOWER ON SOIL WATER REGIME

open access: yesМеліорація і водне господарство, 2023
The article analyses the features of water consumption of sunflowers in short-term crop rotations. Presents the results of the 2020‒2021 research carried out in the experimental field of Kharkiv National Agrarian University named after V. V.
Z. O. Dehtiarova
doaj   +1 more source

Multicolour Sunflowers

open access: yesCombinatorics, Probability and Computing, 2018
A sunflower is a collection of distinct sets such that the intersection of any two of them is the same as the common intersectionCof all of them, and |C| is smaller than each of the sets. A longstanding conjecture due to Erdős and Szemerédi (solved recently in [7, 9]; see also [22]) was that the maximum size of a family of subsets of [n] that contains ...
Dhruv Mubayi, Lujia Wang
openaire   +2 more sources

The effect of pig manure fermented by larvae of house flies on the yield parameters of sunflowers (Helianthus annus L.)

open access: yesActa Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2010
The effect of fermented pig manure processed on a bed of wooden shavings and fermented for seven days by larvae of house flies on the yield parameters of sunflowers have been investigated on Haplic Luvisol in the pot trial realized in vegetative cage ...
Peter Kováčik   +4 more
doaj   +1 more source

Sunflowers and robust sunflowers from randomness extractors

open access: yesTheory Comput., 2022
Summary: The Erdős-Rado Sunflower Theorem [\textit{P. Erdős} and \textit{R. Rado}, J. Lond. Math. Soc. 35, 85--90 (1960; Zbl 0103.27901)] is a fundamental result in combinatorics, and the corresponding Sunflower Conjecture is a central open problem. Motivated by applications in complexity theory, \textit{B. Rossman} [SIAM J. Comput. 43, No. 1, 256--279
Xin Li 0006   +2 more
openaire   +3 more sources

Sunflowers in Lattices [PDF]

open access: yesThe Electronic Journal of Combinatorics, 2005
A Sunflower is a subset $S$ of a lattice, with the property that the meet of any two elements in $S$ coincides with the meet of all of $S$. The Sunflower Lemma of Erdös and Rado asserts that a set of size at least $1 + k!(t-1)^k$ of elements of rank $k$ in a Boolean Lattice contains a sunflower of size $t$.
openaire   +2 more sources

ALGEBRAIC SUNFLOWERS

open access: yes, 2023
We study sunflowers within the context of finitely generated substructures of ultrahomogeneous structures. In particular, we look at bounds on how large a set system is needed to guarantee the existence of sunflowers of a given size. We show that if we fix the size of the sunflower, the function which takes the size of the substructures in our set ...
Ackerman, Nathanael, Mirabi, Mostafa
openaire   +2 more sources

DETERMINATION OF PHYSICAL PROPERTIES OF SOME SEEDS [PDF]

open access: yesScientific Papers Series : Management, Economic Engineering in Agriculture and Rural Development, 2022
The main objective of this research to determine of physical properties of seed related to help in safe passage for seed through cleaning and separation processes.
Tarek FOUDA   +3 more
doaj  

Minimal Linear Codes Constructed from Sunflowers

open access: yesEntropy, 2023
Sunflower in coding theory is a class of important subspace codes and can be used to construct linear codes. In this paper, we study the minimality of linear codes over Fq constructed from sunflowers of size s in all cases.
Xia Wu, Wei Lu
doaj   +1 more source

Home - About - Disclaimer - Privacy