It attempts to avoid steps that are too large and can help improve robustness 
of convergence in some cases.

    Ray


> On Oct 17, 2016, at 4:53 AM, André Carvalho da Silva 
> <andre.c.si...@inesctec.pt> wrote:
> 
> Hello everyone,
>  
> I’ve been wondering about what does the “optional step-control” part of the 
> MIPS algorithm serves for.
>  
> Ok, I understand it must be associated with the MIPS alphaD and alphaP steps, 
> but I wonder for what kind of particular conditions it is useful. 
>  
> Does it try to accelerate convergence? Does it solve convergence problems?
>  
> Thank you in advance.
>  
> Best regards,
> André

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