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RandomComplexes :: testTimeForLLLonSyzygies

testTimeForLLLonSyzygies -- test timing for LLL on syzygies

Synopsis

Description

We randomly choose an r × 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}, .00291827, .00160394)

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

o4 = ({50, 2.30853e454, 98}, .00912054, .133973)

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

o5 = {{.00953719, .0354164}, {.00870785, .00937788}, {.00957243, .0162304},
     ------------------------------------------------------------------------
     {.00976529, .0272108}, {.00956821, .0424538}, {.046825, .0437086},
     ------------------------------------------------------------------------
     {.00842767, .0218389}, {.00937686, .0187881}, {.00806214, .0115801},
     ------------------------------------------------------------------------
     {.0108495, .0243797}}

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

o6 = .0130692097

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

o7 = .0250984693

o7 : RR (of precision 53)

Ways to use testTimeForLLLonSyzygies :