20,357 research outputs found

    Pierre Loti, Vers Ispahan [Présenté par K. A. Kelly et K. C. Cameron]

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    Vercier Bruno. Pierre Loti, Vers Ispahan [Présenté par K. A. Kelly et K. C. Cameron]. In: Romantisme, 1990, n°70. La noblesse. pp. 116-117

    Description of a new species of Yelicones Cameron, 1887 (Braconidae: Rogadinae) from Southern India

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    Rishabanu, K., Binoy, C., Santhosh, S. (2021): Description of a new species of Yelicones Cameron, 1887 (Braconidae: Rogadinae) from Southern India. Zootaxa 5016 (2): 294-298, DOI: 10.11646/zootaxa.5016.2.1

    The Muslim architecture of Egypt

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    page, title page, Volume

    Callichimaeridae Luque & Feldmann & Vernygora & Schweitzer & Cameron & Kerr & Vega & Duque & Strange & Palmer & Jaramillo 2019, fam. nov.

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    Callichimaeridae fam. nov. LSID. urn:lsid:zoobank.org:act: A5D6688D-756B-4FB7-8098- 5EB066C38383 Included genus. Callichimaera gen. nov. Diagnosis. As for type genus and species.Published as part of Luque, J., Feldmann, R. M., Vernygora, O., Schweitzer, C. E., Cameron, C. B., Kerr, K. A., Vega, F. J., Duque, A., Strange, M., Palmer, A. R. & Jaramillo, C., 2019, Exceptional preservation of mid-Cretaceous marine arthropods and the evolution of novel forms via heterochrony, pp. 1-15 in Science Advances 5 (4) on page 3, DOI: 10.1126/sciadv.aav3875, http://zenodo.org/record/590278

    QATAR-2 : a K dwarf orbited by a transiting hot Jupiter and a more massive companion in an outer orbit

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    We report the discovery and initial characterization of Qatar-2b, a hot Jupiter transiting a V = 13.3 mag K dwarf in a circular orbit with a short period, P b = 1.34 days. The mass and radius of Qatar-2b are M P = 2.49 M J and R P = 1.14 R J, respectively. Radial-velocity monitoring of Qatar-2 over a span of 153 days revealed the presence of a second companion in an outer orbit. The Systemic Console yielded plausible orbits for the outer companion, with periods on the order of a year and a companion mass of at least several M J. Thus, Qatar-2 joins the short but growing list of systems with a transiting hot Jupiter and an outer companion with a much longer period. This system architecture is in sharp contrast to that found by Kepler for multi-transiting systems, which are dominated by objects smaller than Neptune, usually with tightly spaced orbits that must be nearly coplanar

    Base sizes for simple groups and a conjecture of Cameron

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    Let G be a permutation group on a finite set ?. A base for G is a subset B C_ ? whose pointwise stabilizer in G is trivial; we write b(G) for the smallest size of a base for G. In this paper we prove that b(G) ? if G is an almost simple group of exceptional Lie type and is a primitive faithful G-set. An important consequence of this result, when combined with other recent work, is that b(G) ? 7 for any almost simple group G in a non-standard action, proving a conjecture of Cameron. The proof is probabilistic and uses bounds on fixed point ratios

    Dynamics of plane partitions: Proof of the Cameron and Fon-Der-Flaass conjecture

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    One of the oldest outstanding problems in dynamical algebraic combinatorics is the following conjecture of P. Cameron and D. Fon-Der-Flaass (1995): consider a plane partition P in an a×b×ca \times b \times c box B{\sf B}. Let Ψ(P)\Psi (P) denote the smallest plane partition containing the minimal elements of BP{\sf B} - P. Then if p=a+b+c1p= a+b+c-1 is prime, Cameron and Fon-Der-Flaass conjectured that the cardinality of the Ψ\Psi -orbit of P is always a multiple of p. This conjecture was established for p0p \gg 0 by Cameron and Fon-Der-Flaass (1995) and for slightly smaller values of p in work of K. Dilks, J. Striker and the second author (2017). Our main theorem specializes to prove this conjecture in full generality
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