triangular matrix

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triangular matrix

[trī′aŋ·gyə·lər ′mā·triks]
(mathematics)
A matrix where either all entries above or all entries below the principal diagonal are zero.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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The difference to the previous sampling scheme for ST is that we now condition on [[SIGMA].sup.T] and are interested in sampling the free elements of the lower-triangular matrix [[LAMBDA].sub.t].
Time-varying parameter vector autoregressions: specification, estimation, and an application
(Continued) After applying Tarjan's algorithm to obtain a block lower-triangular matrix for our example, we have the permutation vector [[1 3 2 4 5 6].sup.T].
Steady--state analysis of Google--like stochastic matrices with block iterative methods
Here we choose to solve the algebraic problem in equation (5.1) with an iterative solution method preconditioned by a block lower-triangular matrix
Preconditioning of nonsymmetric saddle point systems as arising in modelling of viscoelastic problems

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