André Vachon (1933-2003)

A conjecture of Yves André . ∗

The introduction to [2] (and references contained therein) contains a comprehensive exposition of terminology and notations relative to this conjecture. Since we use the same terminology and notations, we do not reproduce them here. The introduction to [2] also contains an exposition of results on this conjecture obtained before the article [3] came out. In this article we prove the following t...

François Bach and André Herbelin

Reals which Compute Little André

We investigate combinatorial lowness properties of sets of natural numbers (reals). The real A is super-low if A′ ≤tt ∅′, and A is jump-traceable if the values of {e}A(e) can be effectively approximated in a sense to be specified. We investigate those properties, in particular showing that super-lowness and jump-traceability coincide within the r.e. sets but none of the properties implies the o...

Canynge Hall 1933-1969

ust over thirty-five years ago the newly formed Univer-Department of Preventive Medicine was opened at anynge Hall, a former hotel (Plate V), by the then 'hister of Health, Sir Hilton Young. He described the ?Ccasion as the celebration of a marriage of the City Bristol with the fair nymph of knowledge, and Dr. anley Badock, in proposing the vote of thanks, hoped at it would be a lasting and hap...

Michael Heidelberger, 1933