Federigo Enriques, Gaston Bachelard et Ferdinand Gonseth

Federigo Enriques ’ s Quest to Prove the “ Completeness Theorem ”

T he golden age of the Italian school of algebraic geometry began with Antonio Luigi GaudenzioGiuseppeCremona and included among its main contributors Enrico Castelnuovo, Federigo Enriques, and Francesco Severi. The Italian school spanned nearly a century, from the unification of Italy in 1861 to Enriques’s posthumously published postWorld War II monograph on algebraic surfaces [Enrq 49]. In th...

Housing Complexes: Redesigning the house of psyche in light of a curious mistranslation of C. G. Jung appropriated by Gaston Bachelard

Cannabis-related psychosis and the gene-environment interaction: comments on Ferdinand et Al. 2005.

The results of this impressive study [1] confirm the results by Henquet et al . [2], who first tested the hypothesis that psychotic experiences at baseline (assessed with the Symptom Checklist Psychoticism and Paranoid Ideation scales) predict future cannabis use. Henquet and colleagues reported an OR of 1.42 (95% CI: 0.88, 2.31) for the risk of developing cannabis use in those who 3–4 years ea...

Empty Real Enriques Surfaces and Enriques-einstein-hitchin 4-manifolds

N. Hitchin [H] proved that the Euler characteristic χ(E) and signature σ(E) of a compact orientable 4-dimensional Einstein manifold E satisfy the inequality |σ(E)| 6 2 3χ(E), the equality holding only if either E is flat or the universal covering X of E is a K3-surface and π1(E) = 1, Z/2, or Z/2× Z/2. In the latter cases, E is a K3-surface if π1 = 1, an Enriques surface if π1 = Z/2, or the quot...

Ferdinand Sauerbruch: Pioneer Thoracic Surgeon.