Computing Hilbert class polynomials with the Chinese Remainder Theorem

16 Mar 2009Andrew V. Sutherland

We present a space-efficient algorithm to compute the Hilbert class polynomial H_D(X) modulo a positive integer P, based on an explicit form of the Chinese Remainder Theorem. Under the Generalized Riemann Hypothesis, the algorithm uses O(|D|^(1/2+o(1))log P) space and has an expected running time of O(|D|^(1+o(1))... (read more)

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