Dear Steve,
Yes, I am probing to some extent today's conception of math and physics as solicited with the topic of this contest. I don't have illusions. Most contestants prefer offering their speculations while they blindly trust in the basics and authorities I am questioning. Someone who did not understand Einstein, disrespects Cantor and Hilbert, and criticizes or ignores my pet deserves to be rated one.
It is perhaps easier to agree on selected claims of my essay than to acknowledge the intrinsic links between the five provocative figures in it.
Let me begin with a question you raised: Do we need negative frequency? Trained at TU Dresden, I was teaching foundations of electrical engineering at Otto-von-Guericke-University Magdeburg for forty years, enough time for a careful scrutiny of complex calculus and its interpretation. Physicists from a freshman up to a Feynman do not devote much attention to the first steps and tend to interpret negative frequencies at which they arrived. They are even ready to split the time into clockwise and anticlockwise domains.
Presumably you did not yet understand me when you wrote:[negative frequencies are] "just as real and useful as positive frequencies". Go back to my Fig. 1. It illustrates an undeniable fact: Future data cannot be measured in advance. Only functions of positive elapsed time can be subject to spectral analysis.
I will explain consequences in the next post.
Eckard