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Documents authored by Grossi, Davide

Document
DOI: 10.4230/OASIcs.Tokenomics.2020.5
Decentralization in Open Quorum Systems: Limitative Results for Ripple and Stellar

Authors: Andrea Bracciali, Davide Grossi, and Ronald de Haan

Published in: OASIcs, Volume 82, 2nd International Conference on Blockchain Economics, Security and Protocols (Tokenomics 2020)

Abstract
Decentralisation is one of the promises introduced by blockchain technologies: fair and secure interaction amongst peers with no dominant positions, single points of failure or censorship. Decentralisation, however, appears difficult to be formally defined, possibly a continuum property of systems that can be more or less decentralised, or can tend to decentralisation in their lifetime. In this paper we focus on decentralisation in quorum-based approaches to open (permissionless) consensus as illustrated in influential protocols such as the Ripple and Stellar protocols. Drawing from game theory and computational complexity, we establish limiting results concerning the decentralisation vs. safety trade-off in Ripple and Stellar, and we propose a novel methodology to formalise and quantitatively analyse decentralisation in this type of blockchains.
Cite as

Andrea Bracciali, Davide Grossi, and Ronald de Haan. Decentralization in Open Quorum Systems: Limitative Results for Ripple and Stellar. In 2nd International Conference on Blockchain Economics, Security and Protocols (Tokenomics 2020). Open Access Series in Informatics (OASIcs), Volume 82, pp. 5:1-5:20, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2021)

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@InProceedings{bracciali_et_al:OASIcs.Tokenomics.2020.5,
  author =	{Bracciali, Andrea and Grossi, Davide and de Haan, Ronald},
  title =	{{Decentralization in Open Quorum Systems: Limitative Results for Ripple and Stellar}},
  booktitle =	{2nd International Conference on Blockchain Economics, Security and Protocols (Tokenomics 2020)},
  pages =	{5:1--5:20},
  series =	{Open Access Series in Informatics (OASIcs)},
  ISBN =	{978-3-95977-157-3},
  ISSN =	{2190-6807},
  year =	{2021},
  volume =	{82},
  editor =	{Anceaume, Emmanuelle and Bisi\`{e}re, Christophe and Bouvard, Matthieu and Bramas, Quentin and Casamatta, Catherine},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/OASIcs.Tokenomics.2020.5},
  URN =		{urn:nbn:de:0030-drops-135277},
  doi =		{10.4230/OASIcs.Tokenomics.2020.5},
  annote =	{Keywords: Blockchain, decentralization, game theory, computational complexity}
}
Document
DOI: 10.4230/DagRep.4.5.27
JA4AI – Judgment Aggregation for Artificial Intelligence (Dagstuhl Seminar 14202)

Authors: Franz Dietrich, Ulle Endriss, Davide Grossi, Gabriella Pigozzi, and Marija Slavkovik

Published in: Dagstuhl Reports, Volume 4, Issue 5 (2014)

Abstract
This report documents the programme and the outcomes of Dagstuhl Seminar 14202 on "Judgment Aggregation for Artificial Intelligence". Judgment aggregation is a new group decision-making theory that lies in the intersection of logic and social choice; it studies how to reach group decisions on several logically interconnected issues by aggregation of individual judgments. Until recently research in judgment aggregation was dominated by its originating context of philosophy, political science and law. Presently, however we are witnessing increasing work in judgment aggregation from researchers in computer science. Since researchers from such diverse disciplinary backgrounds working on judgment aggregation each publish within their own discipline with virtually no cross-discipline cooperation on concrete projects, it is essential that they are given an opportunity to connect to each other and become aware of the workings of the other side. This seminar has provided such an opportunity.
Cite as

Franz Dietrich, Ulle Endriss, Davide Grossi, Gabriella Pigozzi, and Marija Slavkovik. JA4AI – Judgment Aggregation for Artificial Intelligence (Dagstuhl Seminar 14202). In Dagstuhl Reports, Volume 4, Issue 5, pp. 27-39, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2014)

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@Article{dietrich_et_al:DagRep.4.5.27,
  author =	{Dietrich, Franz and Endriss, Ulle and Grossi, Davide and Pigozzi, Gabriella and Slavkovik, Marija},
  title =	{{JA4AI – Judgment Aggregation for Artificial Intelligence (Dagstuhl Seminar 14202)}},
  pages =	{27--39},
  journal =	{Dagstuhl Reports},
  ISSN =	{2192-5283},
  year =	{2014},
  volume =	{4},
  number =	{5},
  editor =	{Dietrich, Franz and Endriss, Ulle and Grossi, Davide and Pigozzi, Gabriella and Slavkovik, Marija},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DagRep.4.5.27},
  URN =		{urn:nbn:de:0030-drops-46791},
  doi =		{10.4230/DagRep.4.5.27},
  annote =	{Keywords: Judgment Aggregation, Artificial Intelligence, Computational Social Choice, Collective Decision-making}
}
Document
DOI: 10.4230/DFU.Vol4.12111.33
Normative Reasoning and Consequence

Authors: Jan Broersen, Stephen Cranefield, Yehia Elrakaiby, Dov Gabbay, Davide Grossi, Emiliano Lorini, Xavier Parent, Leendert W. N. van der Torre, Luca Tummolini, Paolo Turrini, and François Schwarzentruber

Published in: Dagstuhl Follow-Ups, Volume 4, Normative Multi-Agent Systems (2013)

Abstract
In this chapter, we first provide a general introduction to the research area methodology and relevance, then we discuss normative reasoning for multiagent systems, and finally we discuss current research challenges. We cover the main issues in modern deontic logic, which is much broader than the traditional modal logic framework of deontic logic, with an emphasis to our in- tended audience. To emphasize this broadness, we typically refer to "deontic logic and normative systems" rather than deontic logic only.
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Jan Broersen, Stephen Cranefield, Yehia Elrakaiby, Dov Gabbay, Davide Grossi, Emiliano Lorini, Xavier Parent, Leendert W. N. van der Torre, Luca Tummolini, Paolo Turrini, and François Schwarzentruber. Normative Reasoning and Consequence. In Normative Multi-Agent Systems. Dagstuhl Follow-Ups, Volume 4, pp. 33-70, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2013)

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@InCollection{broersen_et_al:DFU.Vol4.12111.33,
  author =	{Broersen, Jan and Cranefield, Stephen and Elrakaiby, Yehia and Gabbay, Dov and Grossi, Davide and Lorini, Emiliano and Parent, Xavier and van der Torre, Leendert W. N. and Tummolini, Luca and Turrini, Paolo and Schwarzentruber, Fran\c{c}ois},
  title =	{{Normative Reasoning and Consequence}},
  booktitle =	{Normative Multi-Agent Systems},
  pages =	{33--70},
  series =	{Dagstuhl Follow-Ups},
  ISBN =	{978-3-939897-51-4},
  ISSN =	{1868-8977},
  year =	{2013},
  volume =	{4},
  editor =	{Andrighetto, Giulia and Governatori, Guido and Noriega, Pablo and van der Torre, Leendert W. N.},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol4.12111.33},
  URN =		{urn:nbn:de:0030-drops-39994},
  doi =		{10.4230/DFU.Vol4.12111.33},
  annote =	{Keywords: Norms, MAS}
}
Document
DOI: 10.4230/DagSemProc.09121.8
A note on brute vs. institutional facts

Authors: Davide Grossi

Published in: Dagstuhl Seminar Proceedings, Volume 9121, Normative Multi-Agent Systems (2009)

Abstract
The paper investigates the famous Searlean distinction between "brute" and "institutional" concepts from a logical point of view. We show how the partitioning of the non-logical alphabet—e.g., into "brute" and "institutional" atoms—gives rise to interesting modal properties. A modal logic, called UpTo-logic, is introduced and investigated which formalizes the notion of (propositional) logical equivalence up to a given signature.
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Davide Grossi. A note on brute vs. institutional facts. In Normative Multi-Agent Systems. Dagstuhl Seminar Proceedings, Volume 9121, pp. 1-10, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2009)

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@InProceedings{grossi:DagSemProc.09121.8,
  author =	{Grossi, Davide},
  title =	{{A note on brute vs. institutional facts}},
  booktitle =	{Normative Multi-Agent Systems},
  pages =	{1--10},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2009},
  volume =	{9121},
  editor =	{Guido Boella and Pablo Noriega and Gabriella Pigozzi and Harko Verhagen},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DagSemProc.09121.8},
  URN =		{urn:nbn:de:0030-drops-19103},
  doi =		{10.4230/DagSemProc.09121.8},
  annote =	{Keywords: Modal logic, brute and institutional facts}
}
Document
DOI: 10.4230/DagSemProc.09121.14
Dynamic Context Logic and its Application to Norm

Authors: Guillaume Aucher, Davide Grossi, Andreas Herzig, and Emiliano Lorini

Published in: Dagstuhl Seminar Proceedings, Volume 9121, Normative Multi-Agent Systems (2009)

Abstract
Building on a simple modal logic of context, the paper presents a dynamic logic characterizing operations of contraction and expansion on theories. We investigate the mathematical properties of the logic, and use it to develop an axiomatic and semantic analysis of norm change in normative systems. The proposed analysis advances the state of the art by providing a formal semantics of norm-change which, at the same time, takes into account several different aspects of the phenomenon, such as permission and obligation dynamics, as well as the dynamics of classificatory rules.
Cite as

Guillaume Aucher, Davide Grossi, Andreas Herzig, and Emiliano Lorini. Dynamic Context Logic and its Application to Norm. In Normative Multi-Agent Systems. Dagstuhl Seminar Proceedings, Volume 9121, pp. 1-13, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2009)

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@InProceedings{aucher_et_al:DagSemProc.09121.14,
  author =	{Aucher, Guillaume and Grossi, Davide and Herzig, Andreas and Lorini, Emiliano},
  title =	{{Dynamic Context Logic and its Application to Norm}},
  booktitle =	{Normative Multi-Agent Systems},
  pages =	{1--13},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2009},
  volume =	{9121},
  editor =	{Guido Boella and Pablo Noriega and Gabriella Pigozzi and Harko Verhagen},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DagSemProc.09121.14},
  URN =		{urn:nbn:de:0030-drops-19009},
  doi =		{10.4230/DagSemProc.09121.14},
  annote =	{Keywords: Context logic, norm change, deontic logic}
}
Document
DOI: 10.4230/DagSemProc.09121.23
Normative Multi-Agent Programs and Their Logics

Authors: Mehdi Dastani, Davide Grossi, John-Jules Meyer, and Nick Tinnemeier

Published in: Dagstuhl Seminar Proceedings, Volume 9121, Normative Multi-Agent Systems (2009)

Abstract
Multi-agent systems are viewed as consisting of individual agents whose behaviors are regulated by an organization artefact. This paper presents a simplified version of a programming language that is designed to implement norm-based artefacts. Such artefacts are specified in terms of norms being enforced by monitoring, regimenting and sanctioning mechanisms. The syntax and operational semantics of the programming language are introduced and discussed. A logic is presented that can be used to specify and verify properties of programs developed in this language.
Cite as

Mehdi Dastani, Davide Grossi, John-Jules Meyer, and Nick Tinnemeier. Normative Multi-Agent Programs and Their Logics. In Normative Multi-Agent Systems. Dagstuhl Seminar Proceedings, Volume 9121, pp. 1-16, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2009)

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@InProceedings{dastani_et_al:DagSemProc.09121.23,
  author =	{Dastani, Mehdi and Grossi, Davide and Meyer, John-Jules and Tinnemeier, Nick},
  title =	{{Normative Multi-Agent Programs and Their Logics}},
  booktitle =	{Normative Multi-Agent Systems},
  pages =	{1--16},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2009},
  volume =	{9121},
  editor =	{Guido Boella and Pablo Noriega and Gabriella Pigozzi and Harko Verhagen},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DagSemProc.09121.23},
  URN =		{urn:nbn:de:0030-drops-19079},
  doi =		{10.4230/DagSemProc.09121.23},
  annote =	{Keywords: Normative Multi-Agent Systems, Programming Multi-Agent Systems}
}
Document
DOI: 10.4230/DagSemProc.08361.9
Normative Multi-Agent Programs and Their Logics

Authors: Mehdi Dastani, Davide Grossi, John-Jules Ch. Meyer, and Nick Tinnemeier

Published in: Dagstuhl Seminar Proceedings, Volume 8361, Programming Multi-Agent Systems (2008)

Abstract
Multi-agent systems are viewed as consisting of individual agents whose behaviors are regulated by an organization artefact. This paper presents a simplified version of a programming language that is designed to implement norm-based artefacts. Such artefacts are specified in terms of norms being enforced by monitoring, regimenting and sanctioning mechanisms. The syntax and operational semantics of the programming language are introduced and discussed. A logic is presented that can be used to specify and verify properties of programs developed in this language.
Cite as

Mehdi Dastani, Davide Grossi, John-Jules Ch. Meyer, and Nick Tinnemeier. Normative Multi-Agent Programs and Their Logics. In Programming Multi-Agent Systems. Dagstuhl Seminar Proceedings, Volume 8361, pp. 1-16, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2008)

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@InProceedings{dastani_et_al:DagSemProc.08361.9,
  author =	{Dastani, Mehdi and Grossi, Davide and Meyer, John-Jules Ch. and Tinnemeier, Nick},
  title =	{{Normative Multi-Agent Programs and Their Logics}},
  booktitle =	{Programming Multi-Agent Systems},
  pages =	{1--16},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2008},
  volume =	{8361},
  editor =	{Rafael Bordini and Mehdi Dastani and J\"{u}rgen Dix and Amal El Fallah-Seghrouchni},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DagSemProc.08361.9},
  URN =		{urn:nbn:de:0030-drops-16374},
  doi =		{10.4230/DagSemProc.08361.9},
  annote =	{Keywords: Multi-agent systems, norms, agent-oriented programming}
}
Document
DOI: 10.4230/DagSemProc.07122.23
On the Logic of Constitutive Rules

Authors: Davide Grossi, John-Jules Meyer, and Frank Dignum

Published in: Dagstuhl Seminar Proceedings, Volume 7122, Normative Multi-agent Systems (2007)

Abstract
The paper proposes a logical systematization of the notion of counts-as which is grounded on a very simple intuition about what counts-as statements actually mean, i.e., forms of classification. Moving from this analytical thesis the paper disentangles three semantically different readings of statements of the type X counts as Y in context C, from the weaker notion of contextual classification to the stronger notion of constitutive rule. These many ways in which counts-as can be said are then formally addressed by making use of modal logic techniques. The resulting framework allows for a formal characterization of all the involved notions and their reciprocal logical relationships.
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Davide Grossi, John-Jules Meyer, and Frank Dignum. On the Logic of Constitutive Rules. In Normative Multi-agent Systems. Dagstuhl Seminar Proceedings, Volume 7122, pp. 1-33, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2007)

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@InProceedings{grossi_et_al:DagSemProc.07122.23,
  author =	{Grossi, Davide and Meyer, John-Jules and Dignum, Frank},
  title =	{{On the Logic of Constitutive Rules}},
  booktitle =	{Normative Multi-agent Systems},
  pages =	{1--33},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2007},
  volume =	{7122},
  editor =	{Guido Boella and Leon van der Torre and Harko Verhagen},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DagSemProc.07122.23},
  URN =		{urn:nbn:de:0030-drops-9131},
  doi =		{10.4230/DagSemProc.07122.23},
  annote =	{Keywords: Constitutive rules, counts-as, modal logic.}
}
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