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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}, .00326236, .00167349)

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

o4 = ({50, 2.30853e454, 98}, .00951563, .0661875)

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

o5 = {{.0109154, .0232347}, {.0101757, .00786026}, {.0124726, .0126939},
     ------------------------------------------------------------------------
     {.0101072, .0184434}, {.00988424, .0246642}, {.011053, .0233917},
     ------------------------------------------------------------------------
     {.0103694, .0453071}, {.0102611, .0140401}, {.00856217, .0102083},
     ------------------------------------------------------------------------
     {.0121448, .0153333}}

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

o6 = .0105945781

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

o7 = .0195177025

o7 : RR (of precision 53)

Ways to use testTimeForLLLonSyzygies :

For the programmer

The object testTimeForLLLonSyzygies is a method function with options.