1,721,058 research outputs found
Sepolture anomale. Indagini archeologiche e antropologiche dall'epoca classica al Medioevo in Emilia Romagna. Guida alla mostra
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Mefistofele : opera ; theatro dal Verme Primavera 1887 / di Arrigo Boito. Impresa L. Cesari ...
No full textMEFISTOFELE : OPERA ; THEATRO DAL VERME PRIMAVERA 1887 / DI ARRIGO BOITO. IMPRESA L. CESARI ...
Mefistofele : opera ; theatro dal Verme Primavera 1887 / di Arrigo Boito. Impresa L. Cesari ... (1)
Cover (1)
Titelseite (3)
Personaggi (4)
Prologo In Cielo (5)
Prima Parte. Atto Primo (8)
Atto Secondo (12)
Atto Terzo (17)
Seconda Parte. Atto Quarto (19)
Epilogo (22)
Note (24
Remarks on discontinuous optimal solutions for simple integrals of the Calculus of Variations
No full textIn this paper we study the existence of discontinuous, bounded variation optimal solutions of variational problems for simple integrals of the Lagrange type with fixed ends. The integrand is a continuous function which satisfies a growth condition. The Serrin integral for bounded variation functions is obtained by a lower limit process from the usual Lebesgue integral when a bounded variation curve is approximated by a sequence of absolutely continuous trajectories. Using a semicontinuity theorem for the cost functional, an existence theorem is formulated and some estimation relations between the Serrin and Lebesgue integrals are proved in the case of a single discontinuity point. Next these problems are discussed for length integrals with a positive, C1-weight φ(⋅), i.e. the integrand is now φ(t)[1+(x′(t))2]1/2.
The last part is devoted to an integral functional involving the integrand |x′(t)−f(t,x(t))|, where f is a continuous, sublinear function. The existence of either absolutely continuous or discontinuous, bounded variation solutions is discussed in detail
An existence theorem for isoperimetric problems
No full textIn this paper a very general class of isoperimetric problems subject to a general integral condition. The existence of an absolute minimum is established for various types of functions and under weak conditions. Our result generalizes that of L. Torrelli in [Fondamenti di calcolo delle variazione, Vol. II, Zanichelli, Bologna, 1923; Jbuch 49, 348] established for n=1
Pan-European Gas Industry Scenarios. Truth and Lies.
No full textThe research describes the market structure, infrastructures and the leading players of the world natural gas industry at a global level. The objective is to discuss the European policy aimed to liberalize a market which is tightly controlled by few extra-European companies. The position of the authors is skeptical; the ides is that the European nations should develop a coordinated approach to counterbalance the strong market position of the extra_European nations
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