#11612: Bug in NTL wrapper when computing LLL -- 5x5 matrix with 0 rows and 0
columns
--------------------------+-------------------------------------------------
Reporter: was | Owner: was
Type: defect | Status: new
Priority: major | Milestone: sage-4.7.2
Component: interfaces | Keywords:
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
--------------------------+-------------------------------------------------
{{{
sage: B=ntl.mat_ZZ(5,5,range(25))
sage: B.list()
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20,
21, 22, 23, 24]
sage: a,U=B.LLL_XD(0.99,True,True)
---- LLL_XD status ----
elapsed time: 0, stage: 3, rank: 2, swaps: 0
log of prod of lengths: 5.19937
sage: U
[
[2 -3 0 1 0]
[1 -2 1 0 0]
[3 -4 0 0 1]
[1 0 0 0 0]
[-3 1 0 0 0]
]
sage: type(U)
<type 'sage.libs.ntl.ntl_mat_ZZ.ntl_mat_ZZ'>
sage: sage: U.list()
[]
sage: U[0]
ERROR
sage: U.nrows()
0
sage: U.ncols()
0
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11612>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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