I want to calculate $NM^{-1}\bmod q$ as efficiently as possible.
However, I have only $N+\delta$,$M+\mu$ with $\delta,\mu>0$ arbitrarily small.
How accurately can I estimate $NM^{-1}\bmod q$?
Factors of $q$ not known.
2026-03-27 12:00:33.1774612833
Estimating modulus from integer approximation
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