Search results for "Petti"
showing 10 items of 186 documents
A variational henstock integral characterization of the radon-nikodým property
2009
A characterization of Banach spaces possessing the Radon-Nikodym property is given in terms of finitely additive interval functions. We prove that a Banach space X has the RNP if and only if each X-valued finitely additive interval function possessing absolutely continuous variational measure is a variational Henstock integral of an X-valued function. Due to that characterization several X-valued set functions that are only finitely additive can be represented as integrals.
MR3093276 Reviewed Naralenkov, K. M. On continuity and compactness of some vector-valued integrals. Rocky Mountain J. Math. 43 (2013), no. 3, 1015–10…
2014
ZBL MS 63/6 Satco, Bianca-Renata; Turcu, Corneliu-Octavian Henstock-Kurzweil-Pettis integral and weak topologies in nonlinear integral equations on t…
2013
The authors prove an existence result for a nonlinear integral equation on time scales under weak topology assumption in the target Banach space. In the setting of vector valued functions on time scales they consider the Henstock-Kurzweil-Pettis $\Delta$-integral which is a kind of Henstock integral recently introduced by Cichon, M. [Commun. Math. Anal. 11 (2011), no. 1, 94�110]. In this framework they show the existence of weakly continuous solutions for an integral equation x(t)= f(t, x(t))+ (HKP)\int_0^t g(t,s,x(s)) \Delta s governed by the sum of two operators: a continuous operator and an integral one. The main tool to get the solutions is a generalization of Krasnosel'skii fixed point…
MR3191427 Naralenkov, Kirill M., A Lusin type measurability property for vector- valued functions. J. Math. Anal. Appl. 417 (2014), no. 1, 293307. 28…
2014
In the paper under review the author introduces the notion of Riemann measurability for vector-valued functions, generalizing the classical Lusin condition, which is equivalent to the Lebesgue measurability for real valued functions. Let X be a Banach space, let f : [a; b] ! X and let E be a measurable subset of [a; b]. The function f is said to be Riemann measurable on E if for each " > 0 there exist a closed set F E with (E n F) < 0 (where is the Lebesgue measure) and a positive number such that k XK k=1 ff(tk) ?? f(t0 k)g (Ik)k < " whenever fIkgKk =1 is a nite collection of pairwise non-overlapping intervals with max1 k K (Ik) < and tk; t0 k 2 Ik T F. The Riemann measurabilit…
Decomposability in the space of HKP-integrable functions
2014
In this paper we introduce the notion of decomposability in the space of Henstock-Kurzweil-Pettis integrable (for short HKP-integrable) functions. We show representations theorems for decomposable sets of HKP-integrable or Henstock integrable functions, in terms of the family of selections of suitable multifunctions.
A decomposition of Denjoy-Khintchine-Pettis and Henstock-Kurzweil-Pettis integrable multifunctions
2010
We proved in one of our earlier papers that in case of separable Banach space valued multifunctions each Henstock-Kurzweil-Pettis integrable multifunction can be represented as a sum of one of its Henstock-Kurzweil-Pettis integrable selector and a Pettis integrable multifunction. Now, we prove that the same result can be achieved in case of an arbitrary Banach space. Moreover we show that an analogous result holds true also for the Denjoy-Khintchine-Pettis integrable multifunctions. Applying the representation theorem we describe the multipliers of HKP and DKP integrable functions. Then we use this description to obtain an operator characterization of HKP and DKP integrability.
A Riemann sums method in the Theory of vector Integration
2010
Aspetti endocrini e profilo auxologico in bambini e adolescenti con fibrosi cistica
2014
LO SCREENING PER L’IPOTIROIDISMO CONGENITO: DATI RETROSPETTIVI DEGLI ULTIMI 5 ANNI IN UN SINGOLO CENTRO
2018
Introduzione: L’incidenza dell’ipotiroidismo congenito (IC) in Italia varia da 1:2000-1:3000 nati. Il numero delle diagnosi è aumentato da quando il cut-off per il TSH su spot è stato ridotto, rispetto al valore di 10. Obiettivi: Lo studio si prefigge di raccogliere i dati del Centro Screening Neonatale dell’Ospedale dei Bambini “G. Di Cristina”, ARNAS Palermo, al quale pervengono i prelievi di tutti i nati nella Sicilia occidentale, al fine di valutare l’incidenza dell’IC. Materiali e Metodi: Da gennaio 2013 a dicembre 2017, sono stati screenati 79.699 neonati, tramite determinazione del TSH su spot. I neonati con TSH 6mU/L sono stati richiamati per dosare fT4, fT3, TSH, Ab anti-TG e anti-…
Una proposta metodologica di rappresentazione della performance accademica in chiave sistemica: l’applicazione del Dynamic Performance Management al …
2015
L’introduzione della contabilità economico-patrimoniale nel sistema universitario italiano – imposta dalle recenti disposizioni normative – pone oggi diverse sfide di carattere metodologico, culturale, organizzativo e tecnico, agli studiosi delle discipline economico-aziendali. Il presente studio è finalizzato alla progettazione e analisi di un modello di valutazione della performance declinato sulle specificità della fattispecie aziendale “università” secondo una prospettiva sistemica dove coesistano misure di performance competitiva, sociale ed economica, che possano efficacemente supportare i decisori accademici nei processi gestionali. Tale approccio viene comunemente denominato Dynamic…