vonbrand

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	location	Valparaíso, Chile
	age	58
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Associate Professor, Departamento de Informática, Universidad Técnica Federico Santa María

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121 Answers

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14	Can a Turing Machine decide if an NFA accepts a string of prime length?
11	Acquiring the necessary background for research
8	How many minimal spanning trees are there when all edge costs are distinct?
8	Doron ZEILBERGER's P = NP computer proof
7	Regular expression for $\{a^k b^m c^n \mid k+m+n \text{ is odd} \}$

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2,759 Reputation

+10	Is the following grammar ambiguous?
+15	Non-deterministic Turing machine that halts on at least one branches of computation
+15	Give CFG and PDA for the words that start and end with the same symbol
+15	How many minimal spanning trees are there when all edge costs are distinct?

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1 Question

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3	Languages that satisfy the pumping lemma but aren't regular?

115 Tags

41 formal-languages × 23	21 computability × 7
26 algorithms × 21	19 automata × 10
26 finite-automata × 8	18 computer-architecture × 6
24 context-free × 11	18 complexity-theory × 6
22 regular-languages × 12	15 regular-expressions × 5

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