(number theory) An estimate for the size of gaps between consecutive prime numbers, stating that p_n+1-p_n=O(( log p_n)²), where pₙ denotes the nth prime number, O is big O notation, and log is the natural logarithm.

plural of Cramér-Rao bound

(estimation theory, statistics) A lower bound on the variance of unbiased estimators of a deterministic (fixed, though unknown) parameter.