The Batalin-Vilkovisky method (BV) is the most powerful method to analyze
functional integrals with (infinite-dimensional) gauge symmetries presently
known. It has been invented to fix gauges associated with symmetries that do
not close off-shell. Homological Perturbation Theory is introduced and used to
develop the integration theory behind BV and to describe the BV quantization of
a Lagrangian system with symmetries. Localization (illustrated in terms of
Duistermaat-Heckman localization) as well as anomalous symmetries are discussed
in the framework of BV.Comment: 35 page

G. Zavattaro

J. Vitek

J.A. Bergstra

M. Odersky

M.J. Butler

N. Busi

N. Shavit

R. Amadio

R. Bruni

R. Gorrieri

R. Milner

R. Nicola De

S. Bhiri

T. Chothia

T. Harris

V. Danos

English

arXiv

Crossref

A Concurrent Calculus with Atomic Transactions

29 pagesThe Software Transactional Memory (STM) model is an original approach for controlling concurrent accesses to ressources without the need for explicit lock-based synchronization mechanisms. A key feature of STM is to provide a way to group sequences of read and write actions inside atomic blocks, similar to database transactions, whose whole effect should occur atomically. In this paper, we investigate STM from a process algebra perspective and define an extension of asynchronous CCS with atomic blocks of actions. Our goal is not only to set a formal ground for reasoning on STM implementations but also to understand how this model fits with other concurrency control mechanisms. We also view this calculus as a test bed for extending process calculi with atomic transactions. This is an interesting direction for investigation since, for the most part, actual works that mix transactions with process calculi consider compensating transactions, a model that lacks all the well-known ACID properties. We show that the addition of atomic transactions results in a very expressive calculus, enough to easily encode other concurrent primitives such as guarded choice and multiset-synchronization (à la join-calculus). The correctness of our encodings is proved using a suitable notion of bisimulation equivalence. The equivalence is then applied to prove interesting ``laws of transactions'' and to obtain a simple normal form for transactions

Batalin-Vilkovisky Integrals in Finite Dimensions

Abstract

Similar works

Full text

Available Versions

Crossref

HAL AMU

Crossref