Results 11 to 20 of about 7,376 (98)

Locally compact convergence groups and n-transitive actions [PDF]

, 2012
All sigma-compact, locally compact groups acting sharply n-transitively and continuously on compact spaces M have been classified, except for n=2,3 when M is infinite and disconnected. We show that no such actions exist for n=2 and that these actions for
Carette, Mathieu, Dreesen, Dennis
core   +1 more source

Steiner t-designs for large t

, 2008
One of the most central and long-standing open questions in combinatorial design theory concerns the existence of Steiner t-designs for large values of t. Although in his classical 1987 paper, L.
A. Betten, A. Delandtsheer, D. Gorenstein, D. Livingstone, D. Pei, D.G. Higman, D.K. Ray-Chaudhuri, D.R. Hughes, D.R. Stinson, D.R. Stinson, F. Buekenhout, F. Buekenhout, G.-C. Rota, H. Lüneburg, H. Wielandt, J. Saxl, J. Tits, J.D. Dixon, J.H. Conway, L. Teirlinck, M. Hall Jr., M. Huber, M. Huber, M. Huber, M. Huber, M.W. Liebeck, M.W. Liebeck, N.D. Tuan, P. Dembowski, P. Kaski, P.J. Cameron, P.J. Cameron, P.J. Cameron, P.J. Cameron, P.J. Cameron, R.A. Fisher, R.E. Block, T.. Beth, W.C. Huffman, W.M. Kantor, W.M. Kantor   +40 more
core   +2 more sources

An extension of the basic local independence model to multiple observed classifications

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract The basic local independence model (BLIM) is appropriate in situations where populations do not differ in the probabilities of the knowledge states and the probabilities of careless errors and lucky guesses of the items. In some situations, this is not the case. This work introduces the multiple observed classification local independence model
Pasquale Anselmi, Debora de Chiusole, Egidio Robusto, Alice Bacherini, Giulia Balboni, Andrea Brancaccio, Ottavia M. Epifania, Noemi Mazzoni, Luca Stefanutti   +8 more
wiley   +1 more source

Limit Orders and Knightian Uncertainty

International Economic Review, EarlyView.
ABSTRACT A wide variety of financial instruments allows risk‐averse traders to reduce their exposure to risk. This raises the question of what financial instruments allow ambiguity‐averse traders to reduce their exposure to ambiguity. We show in this paper that price‐contingent orders, such as limit orders, are sufficient: In a two‐period trading model,
Michael Greinecker, Christoph Kuzmics
wiley   +1 more source

Clusters in middle-phase percolation on hyperbolic plane

, 2011
I consider p-Bernoulli bond percolation on graphs of vertex-transitive tilings of the hyperbolic plane with finite sided faces (or, equivalently, on transitive, nonamenable, planar graphs with one end) and on their duals.
Czajkowski, Jan
core   +1 more source

Evaluating Allocations of Opportunities

International Economic Review, EarlyView.
ABSTRACT This paper provides a robust criterion for comparing lists of probability distributions—interpreted as allocations of opportunities—faced by different social groups. We axiomatically argue in favor of comparing those lists of probability distributions on the basis of a uniform—among groups—valuation of their expected utility.
Francesco Andreoli, Mathieu Faure, Nicolas Gravel, Tista Kundu   +3 more
wiley   +1 more source

Towards a theory of presence

Noûs, EarlyView.
Abstract The present paper presents a new (formal) theory of presence according to which, roughly, to be present at a place is to have a delegate located at that place. One crucial feature of the theory is that something can be present at a place without thereby being located there.
Claudio Calosi
wiley   +1 more source

Primitive permutation groups containing a cycle

, 2012
The primitive finite permutation groups containing a cycle are classified. Of these, only the alternating and symmetric groups contain a cycle fixing at least three points.
Jones, Gareth A.
core   +1 more source

Modal Logic and Modal Metaphysics: An Avicennian Division of Labour

Theoria, EarlyView.
ABSTRACT This paper argues that Avicenna was both a necessitarian and a realist about contingency. The two aspects of his modal metaphysics are reconciled by arguing that Avicenna's modal metaphysics is founded on realism about essences: strictly speaking, an individual has no contingent properties, but a modal distinction can be made between the ...
Jari Kaukua
wiley   +1 more source

On computing local monodromy and the numerical local irreducible decomposition

Transactions of the London Mathematical Society, Volume 13, Issue 1, December 2026.
Abstract Similarly to the global case, the local structure of a holomorphic subvariety at a given point is described by its local irreducible decomposition. Geometrically, the key requirement for obtaining a local irreducible decomposition is to compute the local monodromy action of a generic linear projection at the given point, which is always well ...
Parker B. Edwards, Jonathan D. Hauenstein   +1 more
wiley   +1 more source