Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Alan Offer"'
Publikováno v:
Environmental Monitoring and Assessment. 185:3721-3733
Riparian condition is commonly measured as part of stream health monitoring programs as riparian vegetation provides an intricate linkage between the terrestrial and aquatic ecosystems. Field surveys of a riparian zone provide comprehensive riparian
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::96c45a91d7b170eec94e3cbdac98fc86
https://doi.org/10.1007/s10661-012-2823-6
https://doi.org/10.1007/s10661-012-2823-6
Publikováno v:
Designs, Codes and Cryptography. 44:87-96
In this paper, we prove that the Hermitian quadrangle $${\mathsf{H}}(4, q^2)$$ is the unique generalized quadrangle Γ of order (q 2, q 3) containing some subquadrangle of order (q 2, q) isomorphic to $${\mathsf{H}}(3, q^2)$$ such that every central
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bb1be3e37791a5da5861bd38c0c84a90
https://doi.org/10.1007/s10623-007-9066-5
https://doi.org/10.1007/s10623-007-9066-5
Autor:
Hendrik Van Maldeghem, Alan Offer
Publikováno v:
Discrete Mathematics. 294(1-2):147-160
Given a finite weak generalized polygon Γ with an order (s,t), we provide necessary conditions on the order for Γ to admit a distance-j ovoid with odd j. This leads to the introduction and study of similar structures involving flags, which we name
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4f5907c8e44f6e21b3cb547a899edecb
Autor:
Hendrik Van Maldeghem, Alan Offer
Publikováno v:
Designs, Codes and Cryptography. 32:351-367
It is shown that if a spread of a finite split Cayley hexagon is translation with respect to two disjoint flags then it is either a hermitian spread or a Ree–Tits spread. Analogously, if an ovoid of a classical generalized quadrangle Q(4, q) is tra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e36eadf9c032ff9f97a10a00778fdd26
https://doi.org/10.1023/b:desi.0000029234.00193.60
https://doi.org/10.1023/b:desi.0000029234.00193.60
Autor:
Alan Offer
Publikováno v:
Geometriae Dedicata. 85:135-145
Ovoids of the finite classical generalized hexagon H(q) that are translation with respect to a point are classified. By duality, translation spreads with respect to a line are classified when the characteristic is three. When the characteristic is no
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2889e48cd9b527c78a3d92033ba3194c
https://doi.org/10.1023/a:1010389603838
https://doi.org/10.1023/a:1010389603838
Autor:
Alan Offer
Publikováno v:
Journal of Combinatorial Theory, Series A. 97:184-186
It is shown that a finite generalized hexagon of order (s, t) can have an ovoid or a spread only if s=t.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1fa6e5e6ac23615af46e5bc802099e29
https://doi.org/10.1006/jcta.2001.3212
https://doi.org/10.1006/jcta.2001.3212
Publikováno v:
Designs, Codes & Cryptography; Sep2007, Vol. 44 Issue 1-3, p87-96, 10p
Publikováno v:
Archiv der Mathematik; Apr2005, Vol. 84 Issue 4, p375-384, 10p
Autor:
Alan Offer, Hendrik Van Maldeghem
Publikováno v:
Designs, Codes & Cryptography; May2004, Vol. 32 Issue 1-3, p351-367, 17p