Preload (cardiology)

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Revision as of 22:51, 4 January 2014 by 74.190.106.165 (talk) (Calculation: Preload is measured in pressure units (mm Hg).)
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"A block reflector is an orthogonal, symmetric matrix that reverses a subspace whose dimension may be greater than one."

It is built out of many elementary reflectors.

It is also referred to as a triangular factor, and is a triangular matrix and they are used in the Householder transformation.

A reflector Q belonging to n() can be written in the form : Q=IauuT where I is the identity matrix for n() , a is a scalar and u belongs to n .

LAPACK routines

Here are some of the LAPACK routines that apply to block reflectors

  • "*larft" forms the triangular vector T of a block reflector H=I-VTVH.
  • "*larzb" applies a block reflector or its transpose/conjugate transpose as returned by "*tzrzf" to a general matrix.
  • "*larzt" forms the triangular vector T of a block reflector H=I-VTVH as returned by "*tzrzf".
  • "*larfb" applies a block reflector or its transpose/conjugate transpose to a general rectangular matrix.

See also


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