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Publicacions matemàtiques

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Publicacions matemàtiques 12 registres trobats  La cerca s'ha fet en 0.00 segons. 
1.
7 p, 228.1 KB Locally graded groups with certain minimal conditions for subgroups, II / Otal, Javier (Universidad de Zaragoza. Departamento de Matemáticas) ; Peña, Juan Manuel (Universidad de Zaragoza. Departamento de Matemáticas)
This paper deals with one of the ways of studying infinite groups many of whose subgroups have a prescribed property, namely the consideration of minimal conditions. If P is a theoretical property of groups and subgroups, we show that a locally graded group G satisfies the minimal condition for subgroups not having P if and only if either G is a Cernikov group or every subgroup of G satisfies P, for certain values of P concerning to normalilty, nilpotency and related ideas.
1988 - 10.5565/PUBLMAT_32288_01
Publicacions matemàtiques, V. 32 n. 2 (1988) p. 151-157  
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2.
6 p, 122.0 KB Some results on the real k-theory of certain homogeneous spaces / Ajetunmobi, M. O.
Let F,(n) be the incomplete complex flag manifold of length r in en. We make a start on the complete determination of the torsion part of the group KO-'(F,(n)) giving results here when r = 2,3.
1988 - 10.5565/PUBLMAT_32288_02
Publicacions matemàtiques, V. 32 n. 2 (1988) p. 159-164  
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3.
2 p, 52.2 KB On a characterization of Azumaya algebras / Dicks, Warren 1947-
A direct proof of Braun's characterization of Azumaya algebras is given.
1988 - 10.5565/PUBLMAT_32288_03
Publicacions matemàtiques, V. 32 n. 2 (1988) p. 165-166  
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4.
4 p, 102.8 KB Null spaces and ranges of polynomials of operators / González, Manuel
We give an elementary proof of the fact that given two polynomials P, Q without common zeros and a linear operator A, the operators P(A) and Q(A) verify some properties equivalent to the pair (P(A), Q(A)) being non-singular in the sense of J. [...]
1988 - 10.5565/PUBLMAT_32288_04
Publicacions matemàtiques, V. 32 n. 2 (1988) p. 167-170  
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5.
7 p, 177.9 KB On the smoothness of levi-foliations / Barrett, D. E. ; Fornaess, J. E.
We study the regularity of the induced foliation of a Levi-flat hypersurface in C'°, showing that the foliation is as many times continuously differentiable as the hypersurface itself. The key step in the proof given here is the construction of a certain family of approximate plurisubharmonic defining functions for the hypersurface in question.
1988 - 10.5565/PUBLMAT_32288_05
Publicacions matemàtiques, V. 32 n. 2 (1988) p. 171-177  
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6.
7 p, 161.3 KB Values in the interior of the L2 -minimal solutions of the aa-equation in the unit ball of Cn / Andersson, Mats
We derive formulas for the values in the interior of the L2-minimal solutions of the aa-equation in the unit ball of Cn. These formulas generalizes previously known formulas for the boundary values of the same solutions. [...]
1988 - 10.5565/PUBLMAT_32288_06
Publicacions matemàtiques, V. 32 n. 2 (1988) p. 179-189  
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7.
8 p, 165.4 KB On the angular limits of Bloch functions / Carmona Domènech, Joan Josep (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Cufí Sobregrau, Julià, 1945- (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Pommerenke, Ch. (Technische Universität (Berlin). Fachbereich Mathematik)
This paper contains a method to associate to each function f in the little Bloch space another function f* in the Bloch space in such way that f has a finite angular limit where f* is radially bounded. [...]
1988 - 10.5565/PUBLMAT_32288_07
Publicacions matemàtiques, V. 32 n. 2 (1988) p. 191-198  
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8.
61 p, 1.4 MB Quadratic systems with a unique finite rest point / Coll, Bartomeu (Universitat de les Illes Balears. Departament de Ciències Matemàtiques i Informàtica) ; Llibre, Jaume (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Gasull, Armengol (Universitat Autònoma de Barcelona. Departament de Matemàtiques)
We study phase portraits of quadratic systems with a unique finite singularity. We prove that there are 111 different phase portraits without limit cycles and that 13 of them are realizable with exactly one limit cycle. [...]
1988 - 10.5565/PUBLMAT_32288_08
Publicacions matemàtiques, V. 32 n. 2 (1988) p. 199-259  
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9.
6 p, 158.4 KB Orlicz spaces for which the Hardy-Littlewood maximal operator is bounded / Gallardo Gómez, Diego (Universidad de Málaga. Departamento de Matemática Aplicada)
Let M be the Hardy-Littlewood maximal operator defined by [fórmula matemàtica inclosa a l'article] where the supremum is taken over all cubes Q containing x and IQI is the Lebesgue measure of Q. In this paper we characterize the Orlicz spaces L*ø, associated to N--functions ø, such that Mis bounded in L*ø. [...]
1988 - 10.5565/PUBLMAT_32288_09
Publicacions matemàtiques, V. 32 n. 2 (1988) p. 261-266  
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10.
8 p, 252.0 KB Nonassociative real H*-algebras / Cabrera García, Miguel (Universidad de Granada. Departamento de Análisis Matemático) ; Martínez, J. (Universidad de Granada. Departamento de Análisis Matemático) ; Rodríguez Palacios, Ángel (Universidad de Granada. Departamento de Análisis Matemático)
We prove that, if A denotes a topologically simple real (non-associative) H*-algebra, then either A is a topologically simple complex H*-algebra regarded as real H*-algebra or there is a topologically simple complex H*-algebra B with *-involution r such that A = {b € B : r(b) = b*} . [...]
1988 - 10.5565/PUBLMAT_32288_10
Publicacions matemàtiques, V. 32 n. 2 (1988) p. 267-274  
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11.
13 p, 294.2 KB On the best choice of a damping sequence in iterative optimization methods / Vaserstein, L. N.
Some iterative methods of mathematical programming use a damping sequence {αt} such that 0 _< αt < 1 for all t, at - 0 as t - ∞, and Σαt = ∞. For example, αt = 1l(t + 1) in Brown's method for solving matrix games. [...]
1988 - 10.5565/PUBLMAT_32288_11
Publicacions matemàtiques, V. 32 n. 2 (1988) p. 275-287  
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12.
3 p, 79.7 KB Correcció a l'article "analisi formalment recursiva" / Tomas, F.
En l'article citat en el títol, publicat en aquesta mateixa revista [1], es demostren, basats en el formalisme AFR (aritmética formalment recursiva), els teoremes de Bolzano-Weierstrass [4 . 8, pp. [...]
1988 - 10.5565/PUBLMAT_32288_12
Publicacions matemàtiques, V. 32 n. 2 (1988) p. 289-291  
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