A characterization of homomorphisms in certain Banach involution algebras
A characterization of maps in which can be approximated by smooth maps
A characterization of maximal regular ideals in lmc algebras
A question of Warner and Whitley concerning a nonunital version of the Gleason-Kahane-Żelazko theorem is considered in the context of nonnormed topological algebras. Among other things it is shown that a closed hyperplane M of a commutative symmetric F*-algebra E with Lindelöf Gel'fand space is a maximal regular ideal iff each element of M belongs to some closed maximal regular ideal of E.
A Characterization of M-Bases.
A characterization of multiplicative linear functionals in Banach algebras
A characterization of Orlicz spaces isometric to Lp-spaces.
In this note we present an affirmative answer to the problem posed by M. Baronti and C. Franchetti (oral communication) concerning a characterization of Lp-spaces among Orlicz sequence spaces. In fact, we show a more general characterization of Orlicz spaces isometric to Lp-spaces.
A Characterization of Ptàk Spaces.
A characterization of Q-algebras of type F
We prove that a real or complex unital F-algebra is a Q-algebra if and only if all its maximal one-sided ideals are closed.
A characterization of reflexivity in terms of the existence of generalized centers.
A characterization of regular averaging operators and its consequences
We present a characterization of continuous surjections, between compact metric spaces, admitting a regular averaging operator. Among its consequences, concrete continuous surjections from the Cantor set 𝓒 to [0,1] admitting regular averaging operators are exhibited. Moreover we show that the set of this type of continuous surjections from 𝓒 to [0,1] is dense in the supremum norm in the set of all continuous surjections. The non-metrizable case is also investigated. As a consequence, we obtain...
A Characterization of Schwartz Spaces.
A characterization of sets of functions and distributions on described by constraints on the gradient.
A characterization of singular endomorphisms of a barrelled Ptak space.
A characterization of Sobolev spaces via local derivatives
Let 1 ≤ p < ∞, k ≥ 1, and let Ω ⊂ ℝⁿ be an arbitrary open set. We prove a converse of the Calderón-Zygmund theorem that a function possesses an derivative of order k at almost every point x ∈ Ω and obtain a characterization of the space . Our method is based on distributional arguments and a pointwise inequality due to Bojarski and Hajłasz.
A characterization of some weak semi-continuity of integral functionals
A characterization of spectral operators of finite type
A characterization of subspaces of
A characterization of the algebra of holomorphic functions on simply connected domain.
A characterization of the -realcompact space
A Characterization of the Banach Spaces of Type p by Lévy Measures.