Zsolt GazdagMiguel A Gutiérrez-NaranjoMembrane Computing-international ConferenceGazdag, Z., Guti´errez-Naranjo, M.A.: Solving the ST-connectivity problem with pure membrane computing techniques. In: Gheorghe, M., Rozenberg, G., Salomaa, A., Sos´ik, P., Zandron, C. (eds.) Membrane ...
Given a directed graph G and two of its nodes s and t, the directed st-connectivity problem (stcon) is to decide whether there is a directed path from s to t in G. Establishing a super-logarithmic space lower bound for stcon on a general computation model such as Turing machine or ...
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Undirected st-connectivity is an important problem in computing. There are algorithms for this problem that use O (n) time and ones that use O (log n) space. The main result of this paper is that, in a very natural structured model, these upper bounds are not simultaneously achievable. ...
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Summary: We show that the directed $st$-connectivity problem cannot be expressed in symmetric Datalog, a fragment of Datalog introduced in [{\\it L. Egri}, {\\it B. Larose} and {\\it P. Tesson}, "Symmetric Datalog and constraint satisfaction problems in logspace", in: Proceedings of ...
STMicroelectronics (NYSE: STM), a global semiconductor leader serving customers across the spectrum of electronics applications, will exhibit at MWC Shanghai 2024 (Booth N1.D85) on 26-28 June. ST is at the forefront of innovation, developing unique technologies and products that empower our ...
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Time-space lower bounds for undirected and directed st-connectivity on JAG models Je A. Edmonds Doctor of Philosophy 1993 Department of Computer Science University of Toronto Directed and undirected st-connectivity are important problems in computing. There are algorithms for the undirected case that ...
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