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We study effectively the Cartan geometry of Levi-nondegenerate C 6-smooth hypersurfaces M 3 in ℂ2. Notably, we present the so-called curvature function of a related Tanaka-type normal connection explicitly in terms of a graphing function for M, which is the initial, single available datum. Vanishing of this curvature function then characterizes explicitly the local biholomorphic equivalence of such M 3 ⊂ ℂ2 to the Heisenberg sphere ℍ3, such M’s being necessarily real analytic.

Exponentiation de la dérivation, et intégration des séries en variables non commutatives

Claude Lenormand (1969/1970)

Séminaire Schützenberger

Ext-algebras and derived equivalences

Dag Madsen (2006)

Colloquium Mathematicae

Using derived categories, we develop an alternative approach to defining Koszulness for positively graded algebras where the degree zero part is not necessarily semisimple.

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Displaying 1 – 18 of 18

Embeddings into Power Series Rings.

Endlichdimensionale graduierte Algebren und ihre Darstellungen

Endomorphism Near-Ring of a Relatively Free Group.

Epis and monos which must be isos.

Errata-Corrige : “Linearly compact rings and strongly quasi-injective modules”

Erratum - On the Bohr Compactification.

Erweiterung topologischer Halbringe durch Quotienten- und Differenzenbildung.

Essai d'une théorie noethérienne homogène pour les anneaux commutatifs dont la graduation est aussi générale que possible

Existence and Posner's theorem for $α$ -derivations in prime near-rings.

Existence of pseudo-superinvolutions of the first kind.

Explicit expression of Cartan’s connection for Levi-nondegenerate 3-manifolds in complex surfaces, and identification of the Heisenberg sphere

Exponentiation de la dérivation, et intégration des séries en variables non commutatives

Ext-algebras and derived equivalences

Extending Derivations and Endomorphisms to Skew Polynomial Rings

Extending Group Modules in a Relatively Prime Case.

Extension-closure and attainability for varieties of algebras with involution

Extensions of Chain Rings.

Extensions of rational modules.

Currently displaying 1 – 18 of 18