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6.4.3 set_upkara, set_uptkara, set_upfft

set_upkara([threshold])
set_uptkara([threshold])
set_upfft([threshold])
:: 1 変数多項式の積演算における N^2 , Karatsuba, FFT アルゴリズムの切替えの閾値

return
設定されている値
threshold
非負整数

参照
6.4.2 kmul, ksquare, ktmul, 6.4.1 umul, umul_ff, usquare, usquare_ff, utmul, utmul_ff.



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