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Matrix RILU Relax Factor
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::

	Matrix RILU relax factor = <float>

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Description / Usage
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This optional card provides a relaxation factor to Aztec to be used in conjunction with
preconditioners based on RILU(k,ω) approximate factorization. The input parameter
<float> is defined as

<float>
    **fac,** a floating point number ( fac ≥ 0 ) that specifies a relaxation
    factor.

If the *Matrix RILU relax factor* card is omitted, the default is **1.**

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Examples
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Following is a sample card:
::

	Matrix RILU relax factor = 0.5

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Technical Discussion
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Some limiting values for fac provide specific behavior:

* for a value of zero, the ILU(k) is obtained

* for a value of one, the MILU(k) is obtained.

The value of *k* is set by the *Matrix graph fillin* card.