[From Rick Marken (960113.1300)]

Me:

The gain, g, you are talking about is not _loop_ gain; it

is the linear operator in an open loop sequential process:X(n) < g*X(n-1)

Bruce Abbott (960113.1450) --

How can a sequential process in which X ----> X be open loop?

Because X(n-1) is not having an effect on X(n) _while_ X(n)

is having an effect on X(n-1). Your equation describes a

system with one direction of causality -- from X(n-1) to X(n);

that's _open loop_; there is no causal loop.

Here is the diagram:

X -------[f(X)]

^ |

> >

+-----------+

This is a delay loop; not a closed causal loop. Nice try, but

no cigar.

Your sarcasm is neither deserved nor does it belong on CSGNET.

Obviously, I disagree.

Best

Rick