An estimate for narrow operators on $$L^p([0, 1])$$

On an Estimate of Calderón-zygmundoperators by Dyadic Positive Operators

This result is applied to weighted inequalities. In particular, it implies (i) the “twoweight conjecture” by D. Cruz-Uribe and C. Pérez in full generality; (ii) a simplification of the proof of the “A2 conjecture”; (iii) an extension of certain mixed Ap-Ar estimates to general Calderón-Zygmund operators; (iv) an extension of sharp A1 estimates (known for T ) to the maximal Calderón-Zygmund oper...

An approach to estimate software costs within a narrow context

This paper proposes a new approach to estimate software costs using case-based reasoning. In this approach, the costs of a new software project are estimated by firstly retrieving the similar previous project and then adapting its costs to the current conditions. The approach focus on the estimation within a narrow context. The project is described as an ontology which allows the managers to es...

*-frames for operators on Hilbert modules

$K$-frames which are generalization of frames on Hilbert spaces‎, ‎were introduced‎ ‎to study atomic systems with respect to a bounded linear operator‎. ‎In this paper‎, ‎$*$-$K$-frames on Hilbert $C^*$-modules‎, ‎as a generalization of $K$-frames‎, ‎are introduced and some of their properties are obtained‎. ‎Then some relations‎ ‎between $*$-$K$-frames and $*$-atomic systems with respect to a...

Entropy Estimate for Maps on Forests

A 1993 result of J. Llibre, and M. Misiurewicz, (Theorem A [5]), states that if a continuous map f of a graph into itself has an s-horseshoe, then the topological entropy of f is greater than or equal to logs, that is h( f ) ? logs. Also a 1980 result of L.S. Block, J. Guckenheimer, M. Misiurewicz and L.S. Young (Lemma 1.5 [3]) states that if G is an A-graph of f then h(G) ? h( f ). In this pap...

An Estimate on the Heat Kernel of Magnetic Schrödinger Operators and Unformly Elliptic Operators with Non–negative Potentials