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- Alessio Guglielmi
- ACM Trans. Comput. Log.
- 2007

This article introduces a logical system, called BV, which extends multiplicative linear logic by a noncommutative self-dual logical operator. This extension is particularly challenging for the sequent calculus, and so far, it is not achieved therein. It becomes very natural in a new formalism, called the <i>calculus of structures</i>, which is the main… (More)

- Paola Bruscoli, Alessio Guglielmi
- ACM Trans. Comput. Log.
- 2009

We obtain two results about the proof complexity of deep inference: (1) Deep-inference proof systems are as powerful as Frege ones, even when both are extended with the Tseitin extension rule or with the substitution rule; (2) there are analytic deep-inference proof systems that exhibit an exponential speedup over analytic Gentzen proof systems that they… (More)

- Alessio Guglielmi, Lutz Straßburger
- CSL
- 2001

We introduce the calculus of structures: it is more general than the sequent calculus and it allows for cut elimination and the subformula property. We show a simple extension of multiplicative linear logic, by a self-dual non-commutative operator inspired by CCS, that seems not to be expressible in the sequent calculus. Then we show that multiplicative… (More)

- Lutz Straßburger, Alessio Guglielmi
- ACM Trans. Comput. Log.
- 2011

We study a system, called NEL, which is the mixed commutative/noncommutative linear logic BV augmented with linear logic's exponentials. Equivalently, NEL is MELL augmented with the noncommutative self-dual connective seq. In this article, we show a basic compositionality property of NEL, which we call <i>decomposition</i>. This result leads to a… (More)

- Alessio Guglielmi, Lutz Straßburger
- Mathematical Structures in Computer Science
- 2011

System NEL is the mixed commutative/non-commutative linear logic BV augmented with linear logic's exponentials, or, equivalently, it is MELL augmented with the non-commutative self-dual connective seq. System NEL is Turing-complete, it is able to directly express process algebra sequential composition and it faithfully models causal quantum evolution. In… (More)

Jeřábek showed that analytic propositional-logic deep-inference proofs can be constructed in quasipolynomial time from nonanalytic proofs. In this work, we improve on that as follows: 1) we significantly simplify the technique; 2) our normalisation procedure is direct, i.e., it is internal to deep inference. The paper is self-contained, and provides a… (More)

1 Brief Overview The calculus of structures is a new proof theoretical formalism, introduced by myself in 1999 and initially developed by members of my group in Dresden since 2000. It exploits a new symmetry made possible by deep inference. We can present deductive systems in the calculus of structures and analyse their properties, as we do in the sequent… (More)

- Alessio Guglielmi, Lutz Straßburger
- LPAR
- 2002

We extend multiplicative exponential linear logic (MELL) by a non-commutative, self-dual logical operator. The extended system, called NEL, is defined in the formalism of the calculus of structures, which is a generalisation of the sequent calculus and provides a more refined analysis of proofs. We should then be able to extend the range of applications of… (More)

- Alessio Guglielmi, Tom Gundersen
- Logical Methods in Computer Science
- 2008

We introduce 'atomic flows': they are graphs obtained from derivations by tracing atom occurrences and forgetting the logical structure. We study simple manipulations of atomic flows that correspond to complex reductions on derivations. This allows us to prove, for propositional logic, a new and very general normalisation theorem, which contains cut… (More)

- Fabio Gadducci, Corrado Priami, +12 authors Ezra Pound
- 1996