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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}, .00163787, .000876771)

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

o4 = ({50, 2.30853e454, 98}, .00463734, .036506)

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

o5 = {{.00526773, .0126722}, {.00483652, .00420702}, {.0183944, .00664548},
     ------------------------------------------------------------------------
     {.00499044, .0105009}, {.00550381, .0140043}, {.00645649, .0127664},
     ------------------------------------------------------------------------
     {.00575012, .00828755}, {.00663137, .00795341}, {.0165756, .0055096},
     ------------------------------------------------------------------------
     {.00556079, .00821209}}

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

o6 = .0079967245

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

o7 = .00907590010000001

o7 : RR (of precision 53)

Ways to use testTimeForLLLonSyzygies :

For the programmer

The object testTimeForLLLonSyzygies is a method function with options.