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5.1.14 iparm(_JT_ nold_) - number of previous vectors to use in
truncated methods
- Current index: 14
- Intent: In
- Default: _JT_ nold_ default_ (currently 20)
- Typically, the number of iterations (and the likelihood of
failure to converge) decreases as iparm(_JT_ nold_) increases.
However, the cost of the algorithm, both in operations and
memory required, increases as iparm(_JT_ nold_) increases.
Next: 5.2 Floating-point Parameters
Up: 5.1 Integer Parameters
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John A. Turner