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Adolfo Piperno
Researcher at Sapienza University of Rome
Publications - 30
Citations - 2161
Adolfo Piperno is an academic researcher from Sapienza University of Rome. The author has contributed to research in topics: Lambda calculus & Operational semantics. The author has an hindex of 11, co-authored 30 publications receiving 1905 citations.
Papers
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Journal ArticleDOI
Practical graph isomorphism, II
Brendan D. McKay,Adolfo Piperno +1 more
TL;DR: Traces as mentioned in this paper is a graph isomorphism algorithm based on the refinement-individualization paradigm, and it is implemented in several of the key implementations of the program nauty.
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Practical graph isomorphism, II
Brendan D. McKay,Adolfo Piperno +1 more
TL;DR: The description of the best known program nauty is brought up to date and an innovative approach called Traces that outperforms the competitors for many difficult graph classes is described.
Journal ArticleDOI
Nondeterministic Extensions of Untyped λ-Calculus
Ugo de'Liguoro,Adolfo Piperno +1 more
TL;DR: This paper argues in favour of a distinction between nondeterminism and parallelism, due to the conjunctive nature of the former in contrast to the disjunctive character of the latter, and builds a model and proves conservativity theorems for the equational theory of the model and for other theories related to nondeterministic ?
Journal ArticleDOI
A Filter Model for Concurrent $\lambda$-Calculus
TL;DR: Type-free lazy $\lambda$-calculus is enriched with angelic parallelism and demonic nondeterminism, and the induced logical semantics is fully abstract.
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Filter models for conjunctive-disjunctive l-calculi
TL;DR: A notion of reduction is introduced, extending β-reduction of the classical calculus, together with a denotational semantics which is initially defined constructing a set semimodel via simple types.