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Publicacions matemàtiques 12 registres trobats  La cerca s'ha fet en 0.00 segons. 
1.
49 p, 287.2 KB Happy fractals and some aspects of analysis on metric spaces / Semmes, Stephen
There has been a lot of interest and activity along the general lines of «analysis on metric spaces» recently, as in [2], [3], [26], [40], [41], [46], [48], [49], [51], [82], [83], [89], for instance. [...]
2003 - 10.5565/PUBLMAT_47203_01
Publicacions matemàtiques, V. 47 N. 2 (2003) , p. 261-309  
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2.
48 p, 324.5 KB Discretization and anti-discretization of rearrangement-invariant norms / Gogatishvili, Amiran ; Pick, Luboš
We develop a new method of discretization and anti-discretization of weighted inequalities which we apply to norms in classical Lorentz spaces and to spaces endowed with the so-called Hilbert norm. Main applications of our results include new integral conditions characterizing embeddings Γp(v) → Γq(w) and Γp(v) → Λq(w) and an integral characterization of the associate space to Γp(v), where p, q ∈ (0, ∞), v, w are weights on [0, ∞) and fΛp(v) = ∞ 0 f∗(t) pv(t) dt1/p, fΓp(v) = ∞ 0 f∗∗(t) pv(t) dt1/p.
2003 - 10.5565/PUBLMAT_47203_02
Publicacions matemàtiques, V. 47 N. 2 (2003) , p. 311-358  
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3.
14 p, 173.4 KB Characterization of the inessential endomorphisms in the category of Abelian groups / Abdelalim, S. ; Essannouni, H.
An endomorphism f of an Abelian group A is said to be inessential (in the category of Abelian groups) if it can be extended to an endomorphism of any Abelian group which contains A as a subgroup. In this paper we show that f is as above if and only if (f − v idA)(A) is contained in the maximal divisible subgroup of A for some v ∈ Z.
2003 - 10.5565/PUBLMAT_47203_03
Publicacions matemàtiques, V. 47 N. 2 (2003) , p. 359-372  
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4.
15 p, 171.1 KB A Schwarz lemma for correspondences and applications / Verma, Kaushal
A version of the Schwarz lemma for correspondences is studied. Two applications are obtained namely, the 'non-increasing' property of the Kobayashi metric under correspondences and a weak version of the Wong-Rosay theorem for convex, finite type domains admitting a 'non-compact' family of proper correspondences.
2003 - 10.5565/PUBLMAT_47203_04
Publicacions matemàtiques, V. 47 N. 2 (2003) , p. 373-387  
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5.
26 p, 204.7 KB Pronormality, contranormality and generalized nilpotency in infinite groups / Kurdachenko, Leonid A. ; Subbotin, Igor Ya.
This article is dedicated to some criteria of generalized nilpotency involving pronormality and abnormality. Also new results on groups, in which abnormality is a transitive relation, have been obtained.
2003 - 10.5565/PUBLMAT_47203_05
Publicacions matemàtiques, V. 47 N. 2 (2003) , p. 389-414  
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6.
26 p, 200.7 KB Mean directionally curved lines on surfaces immersed in R4 / Mello, Luis Fernando
The notion of principal configuration of immersions of surfaces into R3, due to Sotomayor and Gutierrez [16] for lines of curvature and umbilics, is extended to that of mean directional configuration for immersed surfaces in R4. [...]
2003 - 10.5565/PUBLMAT_47203_06
Publicacions matemàtiques, V. 47 N. 2 (2003) , p. 415-440  
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7.
10 p, 152.5 KB Volumes transverses aux feuilletages d'efinissables dans des structures o-minimales / Chazal, F. (Université de Bourgogne. Institut de Mathématiques de Bourgogne) ; Lion, J.-M. (Université de Rennes)
Let Fλ be a family of codimension p foliations defined on a family Mλ of manifolds and let Xλ be a family of compact subsets of Mλ. Suppose that Fλ, Mλ and Xλ are definable in an o-minimal structure and that all leaves of Fλ are closed. [...]
2003 - 10.5565/PUBLMAT_47203_07
Publicacions matemàtiques, V. 47 N. 2 (2003) , p. 441-450  
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8.
7 p, 120.1 KB Centre-by-metabelian groups with a condition on infinite subsets / Trabelsi, Nadir
In this note, we consider some combinatorial conditions on infinite subsets of groups and we obtain in terms of these conditions some characterizations of the classes L(Nk)F and FL(Nk) for the finitely generated centre-by-metabelian groups, where L(Nk) (respectively, F) denotes the class of groups in which the normal closure of each element is nilpotent of class at most k (respectively, finite groups).
2003 - 10.5565/PUBLMAT_47203_08
Publicacions matemàtiques, V. 47 N. 2 (2003) , p. 451-457  
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9.
17 p, 217.5 KB Rigidité de quelques groupes de germes de difféomorphismes / Touzet, Frédéric
Using the description of non solvable dynamics by Nakai, we give in this paper a new proof of the rigidity properties of some subgroups of Diff(C, 0). The C∞ case is also considered here.
2003 - 10.5565/PUBLMAT_47203_09
Publicacions matemàtiques, V. 47 N. 2 (2003) , p. 459-475  
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10.
11 p, 136.6 KB A Note on the continuous extensions of injective morphisms between free groups to relatively free profinite groups / Coulbois, Thierry ; Sapir, Mark V ; Weil, Pascal
Let V be a pseudovariety of finite groups such that free groups are residually V, and let ϕ: F(A) → F(B) be an injective morphism between finitely generated free groups. We characterize the situations where the continuous extension ˆϕ of ϕ between the pro-V completions of F(A) and F(B) is also injective. [...]
2003 - 10.5565/PUBLMAT_47203_10
Publicacions matemàtiques, V. 47 N. 2 (2003) , p. 477-487  
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11.
8 p, 131.3 KB On the Toëplitz Corona problem / Amar, Eric.
The aim of this note is to characterize the vectors g = (g1,. . . ,gk) of bounded holomorphic functions in the unit ball or in the unit polydisk of Cn such that the Corona is true for them in terms of the H2 Corona for measures on the boundary.
2003 - 10.5565/PUBLMAT_47203_11
Publicacions matemàtiques, V. 47 N. 2 (2003) , p. 489-496  
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12.
19 p, 196.1 KB Lp bounds for Riesz transforms and square roots associated to second order elliptic operators / Hofmann, Steve ; Martell, José María
We consider the Riesz transforms ∇L−1/2, where L≡− divA(x)∇, and A is an accretive, n × n matrix with bounded measurable complex entries, defined on Rn. We establish boundedness of these operators on Lp(Rn), for the range pn < p ≤ 2, where pn = 2n/(n + 2), n ≥ 2, and we obtain a weak-type estimate at the endpoint pn. [...]
2003 - 10.5565/PUBLMAT_47203_12
Publicacions matemàtiques, V. 47 N. 2 (2003) , p. 497-515  
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