TY  - JOUR
N2  - We discuss the tensions between intensionality and extensionality of spatial observations in distributed systems, showing that there are natural models where extensional observational equivalences may be characterized by spatial logics, including the composition and void operators. Our results support the claim that spatial observations do not need to be always considered intensional, even if expressive enough to talk about the structure of systems. For simplicity, our technical development is based on a minimalist process calculus, that already captures the main features of distributed systems, namely local synchronous communication, local computation, asynchronous remote communication, and partial failures. 
JF  - Electronic Notes in Theoretical Computer Science
N1  - Proceedings of the 13th International Workshop on  Expressiveness in Concurrency (EXPRESS 2006) 
SN  - 1571-0661
Y1  - 2007///
ID  - eprints2721
TI  - Extensionality of spatial observations in distributed systems 
AV  - public
KW  - Behavioral equivalence; spatial observations; spatial logics; Hennessy-Milner logic
UR  - http://www.sciencedirect.com/science/article/pii/S1571066107003805
IS  - 3
VL  - 175
EP  -  149
PB  - Elsevier
A1  - Caires, Luis
A1  - Torres Vieira, Hugo 
SP  - 131 
ER  -