摘要:

Flowsare introduced as common generalizations of sinksand small sources. Several natural completeness conditions on a category C are characterized by the existence of suitable factorization structures for flows in C.

ISSN:1607-3606    

DOI:10.1080/16073606.1994.9632212

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

LetXbe a completely regular Hausdorff space andC(X) the space of continuous real-valued functions onX. The epi-topology onC(X) is derived from the Fell topology on the hyperspace of the closed subsets ofXx ℝ by identifying each element ofC(X) with its epigraph.

ISSN:1607-3606    

DOI:10.1080/16073606.1994.9632213

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

This note characterizes the Baire property on the spaceC(X) of continuous real-valued functions defined on a Tychonoff space X, whereC(X) carries the epi-topology.

ISSN:1607-3606    

DOI:10.1080/16073606.1994.9632214

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

IfXis a Banach space without the Schur property, then there is a weakly continuous functionf: [0,1] →Xwhich is not strongly Riemann integrable.

ISSN:1607-3606    

DOI:10.1080/16073606.1994.9632215

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

Most of the papers dealing with transferring topological separation axioms into general categories use forgetful functors into Set. This note shows that basic relations among the separation classes remain true with respect to other functors, too.

ISSN:1607-3606    

DOI:10.1080/16073606.1994.9632216

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

In [2], Aupetit studied the perturbation of elements of a Banach algebraAby elements of an inessential idealIofA. The main result of his paper is based on a lemma ([2], theorem 1.1) obtained by the use of subharmonic methods and analytic multivalued functions. Our aim in this note is to prove Auptetit's perturbation theorem ([2], theorem 2.4) by making use of elementary methods.

ISSN:1607-3606    

DOI:10.1080/16073606.1994.9632217

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

For commutative Banach algebrasBandIand a continuous representation π:B→ M(I), where M(I) are those bounded linear operatorsT: I → Ithat satisfyT(ij) =iT(j) for alli,jεI, the direct sumBIcan be made into a commutative Banach algebra which containsBandIas respectively a closed subalgebra and a closed ideal. This algebra is called the semidirect product ofBandI. Some topological aspects of the character space of a semidirect product are described. Furthermore, decompositions of commutative Banach algebras into the direct sum of a subalgebra and a principal ideal are investigated.

ISSN:1607-3606    

DOI:10.1080/16073606.1994.9632218

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

In this paper we study the subgroups of 3-transposition groups generated by a set of four 3-transpositions. As a consequence we deduce that the smallest Fischer simple groupF22cannot be generated by four 3-transpositions and hence rank (F22:D) = 5 or 6, whereDis the conjugacy class of 3-transpositions inF22and rank (F22:D) denotes the minimum number of 3-transpositions inDgeneratingF22. This result is an extension of the work done by the author in [11].

ISSN:1607-3606    

DOI:10.1080/16073606.1994.9632219

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

We considered a fairly simple model for the growth of two species (or groups) of algae, in the form of a non-autonomous dynamical system. The only variable parameter in this model is the effect of light intensity on growth. Using a simple averaging procedure, we obtained a system which approximately describes the variation of the daily average concentration of living and dead algae. A stability analysis of the equilibria of this system is given, and it is shown that several bifurcation sequences are possible, depending on the properties of the algae. Knowledge of these sequences is helpful when predicting algal blooms.

ISSN:1607-3606    

DOI:10.1080/16073606.1994.9632220

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

ISSN:1607-3606    

DOI:10.1080/16073606.1994.9632221

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor