Herbert, you have replied to a posting of mine in which the point was not
clearly stated. I am not against the idealization leading to the summation
theorem. However I think that the importance of this theorem is exaggerated -
I think I have presented an example in which a single "unknown" channel
reduces the sum of the coefficients to zero. Maybe it would be better for
us to discuss first this example. If I am right (I am still not sure - I am
so uninformed) and if the problem has not been dealt with (is there any
solution?), a lot of complementary study should be done - otherwise the
summation theorem alone seems useless.
Pentcho
