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native: zero index elementary reflectors

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This commit is contained in:
Vladimir Chalupecky
2016-04-15 11:58:58 +09:00
parent 2b99360bb5
commit aa7baaf8d1
4 changed files with 17 additions and 15 deletions
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12
native/dlarft.go
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@@ -10,13 +10,13 @@ import (
"github.com/gonum/lapack"
)
// Dlarft forms the triangular factor t of a block reflector, storing the answer
// Dlarft forms the triangular factor T of a block reflector H, storing the answer
// in t.
// H = 1 - V * T * V^T if store == lapack.ColumnWise
// H = 1 - V^T * T * V if store == lapack.RowWise
// H = I - V * T * V^T if store == lapack.ColumnWise
// H = I - V^T * T * V if store == lapack.RowWise
// H is defined by a product of the elementary reflectors where
// H = H_1 * H_2 * ... * H_k if direct == lapack.Forward
// H = H_k * H_k-1 * ... * H_1 if direct == lapack.Backward
// H = H(0) * H(1) ... H(k-1) if direct == lapack.Forward
// H = H(k-1) ... H(1) * H(0) if direct == lapack.Backward
//
// t is a k×k triangular matrix. t is upper triangular if direct = lapack.Forward
// and lower triangular otherwise. This function will panic if t is not of
@@ -25,7 +25,7 @@ import (
// store describes the storage of the elementary reflectors in v. Please see
// Dlarfb for a description of layout.
//
// tau contains the scalar factor of the elementary reflectors h.
// tau contains the scalar factors of the elementary reflectors H(i).
//
// Dlarft is an internal routine. It is exported for testing purposes.
func (Implementation) Dlarft(direct lapack.Direct, store lapack.StoreV, n, k int,