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# conditionLimit

The condition number limit (Fong-Saunders test only).

```
var conditionLimit: Double
```

## Discussion

The operation terminates iterations if a computed estimate of `cond(Abar)` exceeds this value. This is to prevent certain small or zero singular values of *A* or *Abar* from coming into effect and causing unwanted growth in the computed solution.

You can use [`conditionLimit`](/documentation/Accelerate/SparseLSMROptions/conditionLimit) and [`lambda`](/documentation/Accelerate/SparseLSMROptions/lambda) separately or together to regularize ill-conditioned systems.

Normally, [`conditionLimit`](/documentation/Accelerate/SparseLSMROptions/conditionLimit) is in the range `1000` to `1/eps`.

Suggested value: [`conditionLimit`](/documentation/Accelerate/SparseLSMROptions/conditionLimit) `= 1/(100*eps)`  for compatible systems, [`conditionLimit`](/documentation/Accelerate/SparseLSMROptions/conditionLimit) `= 1/(10*sqrt(eps))` for least squares

---

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