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BMC Genomics

Table 1 Required time and space

From: Efficient calculation of exact probability distributions of integer features on RNA secondary structures

	Polynomial	DFT	DFT with U* units
Time	$O (n 3 S 2 m a x α)$	$O (n 3 S m a x α)$	$O (n 3 S m a x α / U)$
Space	$O ((n 2 + β) S m a x)$	$O (n 2 + β)$	$O ((n 2 + β) U)$

^∗The number of parallelization units must be equal to S_max or less. If U = S_max, DFT with U units requires O(n³α) in time and $O ((n 2 + β) S m a x)$ in space.

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