Blar i NTNU Open på tidsskrift "Mathematische Zeitschrift"
Viser treff 1-12 av 12
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An embedding of the unit ball that does not embed into a Loewner chain
(Journal article; Peer reviewed, 2019)We construct a holomorphic embedding ϕ:B3→C3 such that ϕ(B3) is not Runge in any strictly larger domain. As a consequence, S≠S1 for n=3. -
Asymptotic behavior of Ext for pairs of modules of large complexity over graded complete intersections
(Journal article; Peer reviewed, 2022) -
Bounding the log-derivative of the zeta-function
(Peer reviewed; Journal article, 2021)Assuming the Riemann hypothesis we establish explicit bounds for the modulus of the log-derivative of Riemann’s zeta-function in the critical strip. -
The category of extensions and a characterisation of n-exangulated functors
(Peer reviewed; Journal article, 2023)Additive categories play a fundamental role in mathematics and related disciplines. Given an additive category equipped with a biadditive functor, one can construct its category of extensions, which encodes important ... -
Comparison of invariant metrics and distances on strongly pseudoconvex domains and worm domains
(Journal article; Peer reviewed, 2018)We prove that for a strongly pseudoconvex domain D ⊂ C n , the infinitesimal Carath´eodory metric gC (z, v) and the infinitesimal Kobayashi metric gK(z, v) coincide if z is sufficiently close to bD and if v is sufficiently ... -
Composition operators and embedding theorems for some function spaces of Dirichlet series
(Journal article; Peer reviewed, 2019)We observe that local embedding problems for certain Hardy and Bergman spaces of Dirichlet series are equivalent to boundedness of a class of composition operators. Following this, we perform a careful study of such ... -
Examples of non-algebraic classes in the Brown-Peterson tower
(Journal article; Peer reviewed, 2018)For every n≥0 , we construct classes in the Brown–Peterson cohomology BP⟨n⟩ of smooth projective complex algebraic varieties which are not in the image of the cycle map from the corresponding motivic Brown–Peterson ... -
On G2 and sub-Riemannian model spaces of step and rank three
(Peer reviewed; Journal article, 2021)We give the complete classification of all sub-Riemannian model spaces with both step and rank three. Model spaces in this context refer to spaces where any infinitesimal isometry between horizontal tangent spaces can be ... -
∞ -Operads via symmetric sequences
(Peer reviewed; Journal article, 2021)We construct a generalization of the Day convolution tensor product of presheaves that works for certain double \infty -categories. Using this construction, we obtain an \infty -categorical version of the well-known ... -
Separable equivalences, finitely generated cohomology and finite tensor categories
(Peer reviewed; Journal article, 2023)We show that finitely generated cohomology is invariant under separable equivalences for all algebras. As a result, we obtain a proof of the finite generation of cohomology for finite symmetric tensor categories in ... -
Support varieties—an axiomatic approach
(Journal article; Peer reviewed, 2019)We provide an axiomatic approach for studying support varieties of objects in a triangulated category via the action of a tensor triangulated category, where the tensor product is not necessarily symmetric. This is illustrated ... -
Weighted approximation in C
(Journal article; Peer reviewed, 2019)We prove that if {φj}j is a sequence of subharmonic functions which are increasing to some subharmonic function φ in C , then the union of all the weighted Hilbert spaces H(φj) is dense in the weighted Hilbert ...