id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
2800	Bug in transposed_structure	Tiago Requeijo	Gunter	"The transposed_structure template simply takes an upper triangular matrix and regards it as the transpose of a lower triangular matrix. It doesn't take into account the row/column major storage, leading to the following bug:

If we take the upper matrix U

1 2 3
- 4 5
- - 6

and regard it as the transpose of a lower matrix L

1
2 4
3 5 6

without a row/column major swap, then storing the row major version of the lower matrix is the same as storing the column major version of the upper matrix:

a) row_major for U: 1 2 3 4 5 6
b) row_major for L: 1 2 4 3 5 6

Since the transposed_structure template simply maps the elements to the transpose and doesn't change the storage, we are in fact storing b) instead of a).

"	Bugs	closed	Boost 1.39.0	uBLAS	Boost 1.38.0	Problem	fixed	uBlas, storage scheme, row_major, column_major, triangular_matrix, transposed_structure