non-commutativity in the brain

[Ken Hanly]

I certainly am not and do not pretend to be an expert on the
subject of the article. I merely wondered why people should
be surprised that the brain 
should have some type of non-commutative processing facility
given that
there are plenty of mathematical and non-mathematical
examples of non-commutative operators. Certainly you are
right. This does not make the subject of rotations and
non-commutativity any simpler. My talk of the "long song and
dance" was meant to refer only to the opening parts of your
post that explain at some length the difference between
commutative and non-commutative operations. It must have
been misleading. I didn't mean to lecture or you or comment
on how many posts you make! I don't even pretend to
understand the details of the article. Perhaps I was wrong
but I thought that you were implying that there is something
special and difficult about
non-commutative relations per se. I don't think that there
is but that does not
contradict your point that the problem of rotation and
non-commutativity is
a difficult one, and one that I must admit I know nothing
about.

   Cheers, Ken Hanly 
Les Schaffer wrote:
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