Seminarium Zakładu Geometrii

W ramach seminarium Zakładu Geometrii zapraszamy na odczyt, który wygłosi prof. Maciej Dunajewski (Uniwersytet w Cambridge):

Gravitational instantons, old and new

Odczyt odbędzie się w środę, 21 maja, o godzinie 12:15 w audytorium D005.

Informacje o poprzednich odczytach można znaleźć na stronie seminarium.

Abstrakt: Gravitational instantons are solutions to the four-dimensional Einstein equations in Riemannian signature which give complete metrics and asymptotically ‘look-like’ flat space. Their study has been initiated by Stephen Hawking in his quest for Euclidean quantum gravity, and since then lot of effort has been put to make the term ‘look–like’ into a precise mathematical statement. While Euclidean quantum gravity does not any-more aspire to a status of a fundamental theory, the study of gravitational instantons has influenced both theoretical physics and pure mathematics. I will review the subject and present some new results which disprove the "Euclidean Black Hole Uniqueness Conjecture".