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Rational power of BigFloat should use specialised MPFR function #55204

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Rational power of BigFloat should use specialised MPFR function#55204

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@dpsanders

dpsanders
openedon Jul 21, 2024

big(1.3)^(1//7) currently converts the rational to BigFloat before computing the power, thereby losing accuracy.

It should instead use the specialised MPFR function mpfr_rootn_si.

cc @oscardssmith

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    bignumsBigInt and BigFloatmathsMathematical functionsrationalsThe Rational type and values thereof

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