Questions tagged [infinity]

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Can a program that terminates have a running time of infinity? (Or not have an upper bound)

Can we have an algorithm that takes some input and does something random to it (in such a way that the algorithm does terminate) which does not have a worst-case running time upper-bound? A (non-)...
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Sets of problems in different models of computation and cardinality

In university, I was taught the computational model hierarchy given in the following figure: Essentially, Pushdown Automata (PDA) can solve ...
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Determining if an NFA accepts an infinite language in polynomial time

Can we determine in polynomial time if the language accepted by an NFA is infinite? The case of DFA is simple, but converting an NFA to a DFA may take exponential time. Also, I ran into this post, ...
Avi Tal's user avatar
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