01.02.2014
Balancing Bounded Treewidth Circuits
Erschienen in: Theory of Computing Systems | Ausgabe 2/2014
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Abstract
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Bounded width arithmetic circuits of size n O(1) can be balanced to depth O(logn), provided chains of iterated multiplication in the circuit are of length O(1).
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Boolean bounded fan-in circuits of size n O(1) and treewidth k can be simulated by bounded fan-in formulas of depth O(k 2logn). This strengthens in the non-uniform setting the known inclusion that SC0⊆NC1.
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We demonstrate treewidth restricted cases of Directed-Reachability and Circuit Value Problem that can be solved in LogDCFL.