Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"Settore MATH-02/B - Geometria"”.
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Some developments in balanced and SKT Geometry
L'abstract è presente nell'allegato / the abstract is in the attachment
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p-Kähler and balanced structures on complex manifolds
L'abstract è presente nell'allegato / the abstract is in the attachment
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CALABI-YAU MANIFOLDS OF TYPE A AND THE CONE CONJECTURE FOR HYPERELLIPTIC VARIETIES
A Calabi-Yau n-fold Y is a compact, complex, Kähler n-fold with trivial canonical bundle and h^{i,0}(Y)=0 for 0<1 and Oguiso and Sakurai classified them in dimension 3. In this thesis we provide higher dimensional examples that ensure the existence of Calabi-Yau manifolds of type A in all odd …
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MOTIVIC HOCHSCHILD HOMOLOGY
Let S be a quasi-compact, quasi-separated scheme, such as the spectrum of a field k, and let SH(S) be Morel and Voevodski's stable motivic homotopy category over S. Let R be a motivic ring spectrum in SH(S); we define the motivic Hochschild homology of R via the derived tensor product: MHH(R)=R …
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PERFECT FLUIDS AND SIGMA MODELS: A MATHEMATICAL INVESTIGATION BETWEEN GENERAL RELATIVITY AND COTTON GRAVITY
In this thesis, we deal with two physics-inspired structures on Riemannian manifolds, depending on a smooth map φ between Riemannian manifolds and several other functions and constants; they are called Cotton φ-Perfect Fluids (C-φ-PF) and φ-static perfect fluids space-times (φ-SPFST). The latter …
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Topology & Dynamics in higher-order systems and neural networks
L'abstract è presente nell'allegato / the abstract is in the attachment
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Geometric properties of the Bismut and the Obata connections
L'abstract è presente nell'allegato / the abstract is in the attachment
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SPECIAL RIEMANNIAN STRUCTURES ON FOUR-MANIFOLDS: FROM TWISTOR SPACES TO UNOBSTRUCTED CONDITIONS
This thesis deals with special Riemannian metrics on smooth manifolds: in particular, we study the relations between the existence of metrics satisfying curvature properties and the topology of the manifold they are defined on. In the first part of the work, we introduce Riemannian twistor spaces, …
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RELATIVE A1-CONTRACTIBILITY OF SMOOTH SCHEMES AND EXOTIC MOTIVIC SPHERES
Uno dei problemi emergenti nella geometria algebrica è quello di caratterizzare lo spazio affine n-dimensionale A^n tra schemi affini regolari a meno di A^1-contrazione: una proprietà che rende gli spazi motivici omotopicamente equivalenti a un campo Spec k nella teoria dell'omotopia motivica. …