_ldl_construct_tri_factor(lu, swap_vec, pivs, lower=True)
If lower is True the permuted factors are multiplied as L(1)*L(2)*...*L(k). Otherwise, the permuted factors are multiplied as L(k)*...*L(2)*L(1). See LAPACK documentation for more details.
Note that the original argument "lu" is overwritten.
The triangular array that is extracted from LAPACK routine call with ones on the diagonals.
The array that defines the row swapping indices. If the kth entry is m then rows k,m are swapped. Notice that the mth entry is not necessarily k to avoid undoing the swapping.
The array that defines the block diagonal structure returned by _ldl_sanitize_ipiv().
The boolean to switch between lower and upper triangular structure.
The square outer factor which satisfies the L * D * L.T = A
The permutation vector that brings the lu to the triangular form
Helper function to construct explicit outer factors of LDL factorization.
Hover to see nodes names; edges to Self not shown, Caped at 50 nodes.
Using a canvas is more power efficient and can get hundred of nodes ; but does not allow hyperlinks; , arrows or text (beyond on hover)
SVG is more flexible but power hungry; and does not scale well to 50 + nodes.
All aboves nodes referred to, (or are referred from) current nodes; Edges from Self to other have been omitted (or all nodes would be connected to the central node "self" which is not useful). Nodes are colored by the library they belong to, and scaled with the number of references pointing them