Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Jaroslaw A. Wisniewski"'
Publikováno v:
Geometriae Dedicata. 168:311-337
Local symplectic contractions are resolutions of singularities which admit symplectic forms. Four dimensional symplectic contractions are (relative) Mori Dream Spaces. In particular, any two such resolutions of a given singularity are connected by a
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https://doi.org/10.1007/s10711-013-9832-7
https://doi.org/10.1007/s10711-013-9832-7
Publikováno v:
Oberwolfach Reports. 10:3115-3145
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https://doi.org/10.4171/owr/2013/53
https://doi.org/10.4171/owr/2013/53
Publikováno v:
Journal of the European Mathematical Society. :609-635
We investigate projective varieties which are binary symmetric models of trivalent phylogenetic trees. We prove that they have Gorenstein terminal singularities and are Fano varieties of index 4 and dimension equal to the number of edges of the tree
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https://doi.org/10.4171/jems/90
https://doi.org/10.4171/jems/90
Publikováno v:
Mathematische Annalen. 294:151-165
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https://doi.org/10.1007/bf01934319
https://doi.org/10.1007/bf01934319
Autor:
Jaroslaw A. Wisniewski
Mori cone is rigid in smooth connected families of Fano manifolds.
Comment: Short note, to appear in Bull. London Math. Soc
Comment: Short note, to appear in Bull. London Math. Soc
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Autor:
Wierzba, J., Jaroslaw A. Wisniewski
Publikováno v:
ResearcherID
We classify small contractions of (holomorphically) symplectic 4-folds.
20 pages
20 pages
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http://arxiv.org/abs/math/0201028
http://arxiv.org/abs/math/0201028
Autor:
Ballico, E., Jaroslaw A. Wisniewski
Publikováno v:
ResearcherID
In the present paper we discuss coherent sheaves of rank > 1 whose projectivization gives rise to smooth varieties - varieties of this type are also called smooth scrolls. We prove some basic properties of these varieties and we give some pertinent e
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http://arxiv.org/abs/alg-geom/9311001
http://arxiv.org/abs/alg-geom/9311001
Publikováno v:
ResearcherID
Jaroslaw A. Wisniewski
Jaroslaw A. Wisniewski
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Autor:
Andreatta, M., Jaroslaw A. Wisniewski
Publikováno v:
ResearcherID
Jaroslaw A. Wisniewski
Jaroslaw A. Wisniewski
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Autor:
Andreatta, M., Jaroslaw A. Wisniewski
Publikováno v:
ResearcherID
Let $\f: X \ra Z$ be a proper surjective map from a smooth complex manifold $X$ onto a normal variety $Z$. If $\f$ has connected fibers and $-K_X$ is $\f$-ample then $\f$ is called a good contraction. In the present paper we study good contractions,
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