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	Author	Tronci, Enrico
	Title	Equational Programming in Lambda-Calculus via SL-Systems. Part 2			Type	Journal Article
	Year	1996	Publication	Theoretical Computer Science	Abbreviated Journal
	Volume	160	Issue	1&2	Pages	185-216
	Keywords
	Abstract
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	yes
	Call Number	Sapienza @ mari @ tcs96a			Serial	55
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	Author	Tronci, Enrico
	Title	Equational Programming in lambda-calculus			Type	Conference Article
	Year	1991	Publication	Sixth Annual IEEE Symposium on Logic in Computer Science (LICS)	Abbreviated Journal
	Volume		Issue		Pages	191-202
	Keywords
	Abstract
	Address
	Corporate Author				Thesis
	Publisher	IEEE Computer Society	Place of Publication	Amsterdam, The Netherlands	Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	yes
	Call Number	Sapienza @ mari @ lics91			Serial	58
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	Author	Bobbio, Andrea; Bologna, Sandro; Minichino, Michele; Ciancamerla, Ester; Incalcaterra, Piero; Kropp, Corrado; Tronci, Enrico
	Title	Advanced techniques for safety analysis applied to the gas turbine control system of Icaro co generative plant			Type	Conference Article
	Year	2001	Publication	X Convegno Tecnologie e Sistemi Energetici Complessi	Abbreviated Journal
	Volume		Issue		Pages	339-350
	Keywords
	Abstract	The paper describes two complementary and integrable approaches, a probabilistic one and a deterministic one, based on classic and advanced modelling techniques for safety analysis of complex computer based systems. The probabilistic approach is based on classical and innovative probabilistic analysis methods. The deterministic approach is based on formal verification methods. Such approaches are applied to the gas turbine control system of ICARO co generative plant, in operation at ENEA CR Casaccia. The main difference between the two approaches, behind the underlining different theories, is that the probabilistic one addresses the control system by itself, as the set of sensors, processing units and actuators, while the deterministic one also includes the behaviour of the equipment under control which interacts with the control system. The final aim of the research, documented in this paper, is to explore an innovative method which put the probabilistic and deterministic approaches in a strong relation to overcome the drawbacks of their isolated, selective and fragmented use which can lead to inconsistencies in the evaluation results.
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication	Genova, Italy	Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	yes
	Call Number	Sapienza @ mari @ tesec01			Serial	65
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	Author	Intrigila, Benedetto; Salvo, Ivano; Sorgi, Stefano
	Title	A characterization of weakly Church-Rosser abstract reduction systems that are not Church-Rosser			Type	Journal Article
	Year	2001	Publication	Information and Computation	Abbreviated Journal
	Volume	171	Issue	2	Pages	137-155
	Keywords
	Abstract	Basic properties of rewriting systems can be stated in the framework of abstract reduction systems (ARS). Properties like confluence (or Church-Rosser, CR) and weak confluence (or weak Church-Rosser, WCR) and their relationships can be studied in this setting: as a matter of fact, well-known counterexamples to the implication WCR CR have been formulated as ARS. In this paper, starting from the observation that such counterexamples are structurally similar, we set out a graph-theoretic characterization of WCR ARS that is not CR in terms of a suitable class of reduction graphs, such that in every WCR not CR ARS, we can embed at least one element of this class. Moreover, we give a tighter characterization for a restricted class of ARS enjoying a suitable regularity condition. Finally, as a consequence of our approach, we prove some interesting results about ARS using the mathematical tools developed. In particular, we prove an extension of the NewmanÃ¢â‚¬â„¢s lemma and we find out conditions that, once assumed together with WCR property, ensure the unique normal form property. The Appendix treats two interesting examples, both generated by graph-rewriting rules, with specific combinatorial properties.
	Address
	Corporate Author				Thesis
	Publisher	Academic Press, Inc.	Place of Publication	Duluth, MN, USA	Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0890-5401	ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	yes
	Call Number	Sapienza @ mari @ Intrigila-Salvo-Sorgi:01			Serial	68
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	Author	Bucciarelli, Antonio; Piperno, Adolfo; Salvo, Ivano
	Title	Intersection types and λ-definability			Type	Journal Article
	Year	2003	Publication	Mathematical Structures in Computer Science	Abbreviated Journal
	Volume	13	Issue	1	Pages	15-53
	Keywords
	Abstract	This paper presents a novel method for comparing computational properties of λ-terms that are typeable with intersection types, with respect to terms that are typeable with Curry types. We introduce a translation from intersection typing derivations to Curry typeable terms that is preserved by β-reduction: this allows the simulation of a computation starting from a term typeable in the intersection discipline by means of a computation starting from a simply typeable term. Our approach proves strong normalisation for the intersection system naturally by means of purely syntactical techniques. The paper extends the results presented in Bucciarelli et al. (1999) to the whole intersection type system of Barendregt, Coppo and Dezani, thus providing a complete proof of the conjecture, proposed in Leivant (1990), that all functions uniformly definable using intersection types are already definable using Curry types.
	Address
	Corporate Author				Thesis
	Publisher	Cambridge University Press	Place of Publication	New York, NY, USA	Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0960-1295	ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	yes
	Call Number	Sapienza @ mari @ Bucciarelli-Piperno-Salvo:MSCS-03			Serial	69
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	Author	Bucciarelli, Antonio; Salvo, Ivano
	Title	Totality, Definability and Boolean Circuits			Type	Journal Article
	Year	1998	Publication		Abbreviated Journal
	Volume	1443	Issue		Pages	808-819
	Keywords
	Abstract	In the type frame originating from the flat domain of boolean values, we single out elements which are hereditarily total. We show that these elements can be defined, up to total equivalence, by sequential programs. The elements of an equivalence class of the totality equivalence relation (totality class) can be seen as different algorithms for computing a given set-theoretic boolean function. We show that the bottom element of a totality class, which is sequential, corresponds to the most eager algorithm, and the top to the laziest one. Finally we suggest a link between size of totality classes and a well known measure of complexity of boolean functions, namely their sensitivity.
	Address
	Corporate Author				Thesis
	Publisher	Springer	Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	yes
	Call Number	Sapienza @ mari @ bucciarelli-salvo:98			Serial	70
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	Author	Bucciarelli, Antonio; de Lorenzis, Silvia; Piperno, Adolfo; Salvo, Ivano
	Title	Some Computational Properties of Intersection Types (Extended Abstract)			Type	Journal Article
	Year	1999	Publication		Abbreviated Journal
	Volume		Issue		Pages	109-118
	Keywords	lambda calculusCurry types, intersection types, lambda-definability, lambda-terms, strong normalization
	Abstract	This paper presents a new method for comparing computation-properties of λ-terms typeable with intersection types with respect to terms typeable with Curry types. In particular, strong normalization and λ-definability are investigated. A translation is introduced from intersection typing derivations to Curry typeable terms; the main feature of the proposed technique is that the translation is preserved by β-reduction. This allows to simulate a computation starting from a term typeable in the intersection discipline by means of a computation starting from a simply typeable term. Our approach naturally leads to prove strong normalization in the intersection system by means of purely syntactical techniques. In addition, the presented method enables us to give a proof of a conjecture proposed by Leivant in 1990, namely that all functions uniformly definable using intersection types are already definable using Curry types.
	Address
	Corporate Author				Thesis
	Publisher	IEEE Computer Society	Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	yes
	Call Number	Sapienza @ mari @ bucciarelli-delorenzis-piperno-salvo:99			Serial	71
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	Author	Coppo, Mario; Dezani-Ciancaglini, Mariangiola; Giovannetti, Elio; Salvo, Ivano
	Title	Mobility Types for Mobile Processes in Mobile Ambients			Type	Journal Article
	Year	2003	Publication	Electr. Notes Theor. Comput. Sci.	Abbreviated Journal
	Volume	78	Issue		Pages
	Keywords
	Abstract	We present an ambient-like calculus in which the open capability is dropped, and a new form of Ã¢â‚¬Å“lightweightÃ¢â‚¬Â process mobility is introduced. The calculus comes equipped with a type system that allows the kind of values exchanged in communications and the access and mobility properties of processes to be controlled. A type inference procedure determines the Ã¢â‚¬Å“minimalÃ¢â‚¬Â requirements to accept a system or a component as well typed. This gives a kind of principal typing. As an expressiveness test, we show that some well known calculi of concurrency and mobility can be encoded in our calculus in a natural way.
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	yes
	Call Number	Sapienza @ mari @ Coppo-Dezani-Giovannetti-Salvo:03			Serial	74
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	Author	Della Penna, Giuseppe; Intrigila, Benedetto; Melatti, Igor; Tronci, Enrico; Venturini Zilli, Marisa
	Title	Finite horizon analysis of Markov Chains with the Mur$\varphi$ verifier			Type	Journal Article
	Year	2006	Publication	Int. J. Softw. Tools Technol. Transf.	Abbreviated Journal
	Volume	8	Issue	4	Pages	397-409
	Keywords
	Abstract	In this paper we present an explicit disk-based verification algorithm for Probabilistic Systems defining discrete time/finite state Markov Chains. Given a Markov Chain and an integer k (horizon), our algorithm checks whether the probability of reaching an error state in at most k steps is below a given threshold. We present an implementation of our algorithm within a suitable extension of the Mur$\varphi$ verifier. We call the resulting probabilistic model checker FHP-Mur$\varphi$ (Finite Horizon Probabilistic Mur$\varphi$). We present experimental results comparing FHP-Mur$\varphi$ with (a finite horizon subset of) PRISM, a state-of-the-art symbolic model checker for Markov Chains. Our experimental results show that FHP-Mur$\varphi$ can handle systems that are out of reach for PRISM, namely those involving arithmetic operations on the state variables (e.g. hybrid systems).
	Address
	Corporate Author				Thesis
	Publisher	Springer-Verlag	Place of Publication	Berlin, Heidelberg	Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	1433-2779	ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	yes
	Call Number	Sapienza @ mari @ Dimtz06			Serial	78
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	Author	Della Penna, Giuseppe; Intrigila, Benedetto; Melatti, Igor; Tronci, Enrico; Venturini Zilli, Marisa
	Title	Bounded Probabilistic Model Checking with the Mur$\varphi$ Verifier			Type	Conference Article
	Year	2004	Publication	Formal Methods in Computer-Aided Design, 5th International Conference, FMCAD 2004, Austin, Texas, USA, November 15-17, 2004, Proceedings	Abbreviated Journal
	Volume		Issue		Pages	214-229
	Keywords
	Abstract	In this paper we present an explicit verification algorithm for Probabilistic Systems defining discrete time/finite state Markov Chains. We restrict ourselves to verification of Bounded PCTL formulas (BPCTL), that is, PCTL formulas in which all Until operators are bounded, possibly with different bounds. This means that we consider only paths (system runs) of bounded length. Given a Markov Chain $\cal M$ and a BPCTL formula Φ, our algorithm checks if Φ is satisfied in $\cal M$. This allows to verify important properties, such as reliability in Discrete Time Hybrid Systems. We present an implementation of our algorithm within a suitable extension of the Mur$\varphi$ verifier. We call FHP-Mur$\varphi$ (Finite Horizon Probabilistic Mur$\varphi$) such extension of the Mur$\varphi$ verifier. We give experimental results comparing FHP-Mur$\varphi$ with (a finite horizon subset of) PRISM, a state-of-the-art symbolic model checker for Markov Chains. Our experimental results show that FHP-Mur$\varphi$ can effectively handle verification of BPCTL formulas for systems that are out of reach for PRISM, namely those involving arithmetic operations on the state variables (e.g. hybrid systems).
	Address
	Corporate Author				Thesis
	Publisher	Springer	Place of Publication		Editor	Hu, A.J.; Martin, A.K.
	Language		Summary Language		Original Title
	Series Editor		Series Title	Lecture Notes in Computer Science	Abbreviated Series Title
	Series Volume	3312	Series Issue		Edition
	ISSN	3-540-23738-0	ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	yes
	Call Number	Sapienza @ mari @ Dimtz04			Serial	87
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