Cyril Dean Darlington 1903–1981

Minimal symmetric Darlington synthesis

We consider the symmetric Darlington synthesis of a p × p rational symmetric Schur function S with the constraint that the extension is of size 2p×2p. Under the assumption that S is strictly contractive in at least one point of the imaginary axis, we determine the minimal McMillan degree of the extension. In particular, we show that it is generically given by the number of zeros of odd multipli...

Cyril Norman Hugh Long.

During his twenty-two years at Yale, Hugh Long has provided leadership as chairman of three departments (physiological chemistry, phar-macology and physiology), as dean, and as chairman of the division of biological sciences of the University, but even this unparalleled record of academic versatility and productivity reflects only a small part of his achievement. four years he came to Yale as P...

Linear Time-varying Darlington Synthesis

Given a contractive linear system T which is represented as a causal linear operator on a Hilbert space H. We study the question: when does there exist an isometric or unitary causal extension of T to H⊕H?

Cyril Norman Hinshelwood, 1897-1967.

Sir Cyril Burt in Perspective

Numerical peculiarities in Sir Cyril Burt's reports of kinship correlations are most reasonably attributable to carelessness rather than fraud. Showing statistically significant deviations from randomness in the final digits of correlations, Ns, and IQs, or other nonrandomness suggesting "digital preferences," is unconvincing as purported evidence that Burt's figures were faked. -No analysis is...