نتایج جستجو برای: weak la nina
تعداد نتایج: 766728 فیلتر نتایج به سال:
1 Arctic Centre, University of Groningen, Groningen, Netherlands, 2 FRAM—High North Research Centre for Climate and the Environment, Norwegian Polar Institute, Tromsø, Norway, 3 Arctic Ecology Department, FRAM—High North Research Centre for Climate and the Environment, Norwegian Institute for Nature Research (NINA), Tromsø, Norway, 4 Department of Biology, Norwegian University of Science and Te...
A topological group G is called extremely amenable if every continuous action of G on a compact space has a fixed point. This concept is linked with geometry of high dimensions (concentration of measure). We show that a von Neumann algebra is approximately finite-dimensional if and only if its unitary group with the strong topology is the product of an extremely amenable group with a compact gr...
This study investigates the inter-relationship between market orientation and service performance of 33 libraries in the south of Finland. Three kinds of market orientation were found: the strong, the medium and the weak. The findings show that the higher market orientation is positively connected with the libraries’ superior service performance. Résumé : Cette étude explore la relation interne...
a lépoque classique, on affirmait que la peinture est une poésie muette, la poésie une peinture parlante. de fait, les relations entre littérature et peinture se sont développées tout au long des siècles dans une constante émulation. dans ce mémoire, nous explorons le dialogue fécond de ces deux arts au début du xxe siècle. lart et la poésie, à laube du xxe siècle, montrent la rupture avec le m...
We show that the well-known König’s Min-Max Theorem (KMM), a fundamental result in combinatorial matrix theory, can be proven in the first order theory LA with induction restricted to Σ1 formulas. This is an improvement over the standard textbook proof of KMM which requires Π2 induction, and hence does not yield feasible proofs — while our new approach does. LA is a weak theory that essentially...
We investigate the theories LA,LAP,∀LAP of linear algebra, which were originally defined to study the question of whether commutativity of matrix inverses has polysize Frege proofs. We give sentences separating quantified versions of these theories, and define a fragment ∃LA of ∀LAP in which we can interpret a weak theory V 1 of bounded arithmetic and carry out polynomial time reasoning about m...
We consider weak lumpability of general nite homogeneous Markov chains evolving in discrete time, that is when a lumped Markov chain with respect to a partition of the initial state space is also a homogeneous Markov chain. We show that weak lumpabilityis equivalent to the existence of a decomposable polyhedral cone which is positively invariant by the transition probability matrix of the origi...
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