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Fredrik Johansson 2014-03-04 12:55:38 +01:00
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doc/source/elefun.rst
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@ -121,7 +121,7 @@ The exponential function
.. function:: void elefun_exp_sum_bs_powtab(fmpz_t T, fmpz_t Q, mp_bitcnt_t * Qexp, const fmpz_t x, mp_bitcnt_t r, long N)
Computes *T*, *Q* and *Qexp* such that
`T / (Q 2^{\text{Qexp}}) = \sum_{k=1}^N (x/2^r)/k!` using binary splitting.
`T / (Q 2^{\text{Qexp}}) = \sum_{k=1}^N (x/2^r)^k/k!` using binary splitting.
Note that the sum is taken to *N* inclusive and omits the constant term.
The *powtab* version precomputes a table of powers of *x*,