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RandomComplexes :: testTimeForLLLonSyzygies

testTimeForLLLonSyzygies -- test timing for LLL on syzygies

Synopsis

Description

We randomly choose an $r \times\ n$ matrix A over ZZ with entries up to the given Height, and take the time to compute B=ker A and an LLL basis of B.

i1 : setRandomSeed "nice example 2";
i2 : r=10,n=20

o2 = (10, 20)

o2 : Sequence
i3 : (m,t1,t2)=testTimeForLLLonSyzygies(r,n,Height=>11)

o3 = ({5, 2.91596e52, 9}, .00219319, .00107408)

o3 : Sequence
i4 : (m,t1,t2)=testTimeForLLLonSyzygies(15,30,Height=>100)

o4 = ({50, 2.30853e454, 98}, .0061033, .0442821)

o4 : Sequence
i5 : L=apply(10,c->(testTimeForLLLonSyzygies(15,30))_{1,2})

o5 = {{.00630311, .0154828}, {.00638805, .00519913}, {.00702093, .00845767},
     ------------------------------------------------------------------------
     {.00687144, .0124548}, {.00682114, .0166226}, {.0237301, .0154074},
     ------------------------------------------------------------------------
     {.00646071, .0100911}, {.00752093, .00932282}, {.00591703, .00665942},
     ------------------------------------------------------------------------
     {.00818662, .0102871}}

o5 : List
i6 : 1/10*sum(L,t->t_0)

o6 = .0085220069

o6 : RR (of precision 53)
i7 : 1/10*sum(L,t->t_1)

o7 = .0109984961

o7 : RR (of precision 53)

Ways to use testTimeForLLLonSyzygies :

For the programmer

The object testTimeForLLLonSyzygies is a method function with options.