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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}, .00336227, .00160956)

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

o4 = ({50, 2.30853e454, 98}, .00952218, .0661529)

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

o5 = {{.010927, .0230462}, {.0103999, .00788105}, {.0122048, .012594},
     ------------------------------------------------------------------------
     {.0105366, .0185573}, {.0101257, .0243698}, {.0111298, .0231357},
     ------------------------------------------------------------------------
     {.0104863, .0153664}, {.0107384, .0140664}, {.00896956, .0100772},
     ------------------------------------------------------------------------
     {.0117759, .0150551}}

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

o6 = .0107293902

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

o7 = .0164149081

o7 : RR (of precision 53)

Ways to use testTimeForLLLonSyzygies :

For the programmer

The object testTimeForLLLonSyzygies is a method function with options.