Algorithm | Time | Space |
Multiplication | M(n) = n log n loglog n | n |
Division | M(n) | n |
Differential equations | M(n) | n |
Holonomic functions | n | n |
Algebraic composition | M(n) log n | n |
General composition | M(n) (n log n)1/2 | n log n |
Composition in finite characteristic | M(n) log n | n |
log f = log | f0 + | ó õ |
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= g - |
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, |
f ° g = (f |
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+ zp/2 f |
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) ° g = f |
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° g + gp/2 (f |
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° g), |
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= g1 z + ... + gq zq | ||||
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= gq+1 zq+1 + ... + gn zn, |
f ° g = f ° g |
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+ (f' ° g |
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) g |
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+ |
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(f'' ° g |
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) (g |
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)2 + ··· . |
f(i) ° g |
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= |
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|
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f(i-1) ° g |
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= fi-1 + i | ó õ |
æ ç ç è |
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f(i) ° g |
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ö ÷ ÷ ø |
g' |
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. |
g2 | 2 | ||
g1 | 1 | 2 | |
g0 | 0 | 1 | 2 |
× | f0 | f1 | f2 |
g = | ó õ f' g. |
g2 | 2 | ||
g1 | 1 | 1 | |
g0 | 0 | 1 | 2 |
× | f0 | f1 | f2 |
g3 | 3 | 3 | 3 | 3 |
g2 | 2 | 3 | 2 | 3 |
g1 | 1 | 1 | 3 | 3 |
g0 | 0 | 1 | 2 | 3 |
× | f0 | f1 | f2 | f3 |
Algorithm | Times | Space |
Karatsuba's multiplication | nlog2 3 | n log n |
Multiplication via FFT | D(n) = M(n) log n | n |
Division | D(n) | n |
Differential equations | D(n) | n |
Holonomic functions | n | n |
Algebraic composition | D(n) log n | n |
General composition | D(n) (n log n)1/2 | n3/2 log n |
Composition in finished characteristic | D(n) log n | n log n |
f(x) = |
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( | 1+f(x+1)+f'(x)2 | ) |
http://www.inria.fr/RRRT/RR-3973.html
.http://www.math.u-psud.fr/~vdhoeven/
.This document was translated from LATEX by HEVEA.