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SUMMARY:Matilde Manzaroli (U. Tübingen)
DTSTART:20210521T140000Z
DTEND:20210521T150000Z
DTSTAMP:20260423T021053Z
UID:LAGARTOS/23
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/LAGARTOS/23/
 ">Real fibered morphisms of real del Pezzo surfaces</a>\nby Matilde Manzar
 oli (U. Tübingen) as part of (LAGARTOS) Latin American Real and Tropical 
 Geometry Seminar\n\n\nAbstract\nA morphism of smooth varieties of the same
  dimension is called \nreal fibered if the inverse image of the real part 
 of the target is the \nreal part of the source. It goes back to Ahlfors th
 at a real algebraic \ncurve admits a real fibered morphism to the projecti
 ve line if and only \nif the real part of the curve disconnects its comple
 x part. Inspired by \nthis result\, in a joint work with Mario Kummer and 
 Cédric Le Texier\, we \nare interested in characterising real algebraic v
 arieties of dimension n \nadmitting real fibered morphisms to the n-dimens
 ional projective space. \nWe present a criterion to construct real fibered
  morphisms that arise as \nfinite surjective linear projections from an em
 bedded variety\; this \ncriterion relies on topological linking numbers. W
 e address special \nattention to real algebraic surfaces. We classify all 
 real fibered \nmorphisms from real del Pezzo surfaces to the projective pl
 ane and \ndetermine when such morphisms arise as the composition of a proj
 ective \nembedding with a linear projection.\n
LOCATION:https://researchseminars.org/talk/LAGARTOS/23/
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