On Mar 6, 2023, at 4:17 AM, Matthew Brett <matthew.brett@lis.ac.uk> wrote:

Hi,

Sorry to keep on at this one, but it is worrying me.

Do we have anyone reading or known to us who can give a fairly
definitive answer to:

On Thu, Mar 2, 2023 at 10:01 PM Matthew Brett <matthew.brett@lis.ac.uk> wrote:
[snip]

?   Is it really true that the modification assists Powell in handling
long skinny valleys?   If so, does it work less well in other
situations? Has anyone compared the algorithms across a good range of
problems?

Cheers,

Matthew
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