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We introduce new biholomorphic invariants for real-analytic hypersurfaces in 2-dimensional complex space and show how they can be used to show that a hypersurface possesses few automorphisms. We give conditions, in terms of the new…

Complex Variables · Mathematics 2007-05-23 P. Ebenfelt , B. Lamel , D. Zaitsev

An algorithmic proof of the General Neron Desingularization theorem is given for $2$-dimensional local rings and morphisms with small singular locus.

Commutative Algebra · Mathematics 2016-12-07 Gerhard Pfister , Dorin Popescu

The purpose of this note is to unify the role of the lantern identity in the proof of several finiteness theorems. In particular, we show that for every nonnegative integer m, the vector space (over the rationals) of type m (resp. T-type m)…

q-alg · Mathematics 2008-02-03 Stavros Garoufalidis

We show that all the tangles in a finite graph or matroid can be distinguished by a single tree-decomposition that is invariant under the automorphisms of the graph or matroid. This comes as a corollary of a similar decomposition theorem…

Combinatorics · Mathematics 2017-04-19 Reinhard Diestel , Fabian Hundertmark , Sahar Lemanczyk

We study the quantum sheaf cohomology of flag manifolds with deformations of the tangent bundle and use the ring structure to derive how the deformation transforms under the biholomorphic duality of flag manifolds. Realized as the OPE ring…

High Energy Physics - Theory · Physics 2020-03-09 Jirui Guo

We describe a non-extensional variant of Martin-L\"of type theory which we call two-dimensional type theory, and equip it with a sound and complete semantics valued in 2-categories.

Logic · Mathematics 2011-10-17 Richard Garner

An analog of Picard's little theorem for entire functions of matrices is proved.

Complex Variables · Mathematics 2026-02-16 Oleg Mushkarov , Nikolai Nikolov

We prove the existence of automorphisms of $\mathbb C^k$, $k\ge 2$, having an invariant, non-recurrent Fatou component biholomorphic to $\mathbb C \times (\mathbb C^\ast)^{k-1}$ which is attracting, in the sense that all the orbits converge…

Complex Variables · Mathematics 2019-01-04 Filippo Bracci , Jasmin Raissy , Berit Stensønes

We developed a quantum theory for degenerate $\chi^{(3)}$ two-photon state generated from optical fiber, and compared the theory predictions with an experimental result which exhibits a Hong-Ou-Mandel dip visibility of around 94%. Excellent…

Quantum Physics · Physics 2007-05-23 Jun Chen , Kim Fook Lee , Prem Kumar

In the present note we show that the Duflo isomorphism extends to an isomorphism of associative algebras of tangential cohomologies. This result confirms the B.Shoikhet's conjecture.

Quantum Algebra · Mathematics 2009-11-10 M. Pevzner , Ch. Torossian

We prove a biadjoint triangle theorem and its strict version, which are $2$-dimensional analogues of the adjoint triangle theorem of Dubuc. Similarly to the $1$-dimensional case, we demonstrate how we can apply our results to get the…

Category Theory · Mathematics 2019-02-05 Fernando Lucatelli Nunes

We prove a Liouville theorem for the plurisubharmonic functions on complete Kaelher manifolds. As the applications, we prove a splitting theorem for complete Kaehler manifolds with nonnegative biscetional curvature in terms of the linear…

Differential Geometry · Mathematics 2007-05-23 Lei Ni , Luen-Fai Tam

We give a detailed proof for two discrete analogues of Courant's Nodal Domain Theorem.

Spectral Theory · Mathematics 2007-05-23 E. Brian Davies , Josef Leydold , Peter F. Stadler

We study and generalize a classical theorem of L. Bers that classifies domains up to biholomorphic equivalence in terms of the algebras of holomorphic functions on those domains. Then we develop applications of these results to the study of…

Complex Variables · Mathematics 2013-12-18 Steven G. Krantz

The main aim of the paper is to develop the "Floer theory" associated to Calabi-Yau 3-folds, exending the analogy of Thomas' "holomorphic Casson invariant". The treatment in the body of the paper is largely formal, assuming appropriate…

Differential Geometry · Mathematics 2009-02-19 Simon Donaldson , Ed Segal

We classify central extensions of the dg Lie algebra of derived global sections of the tangent sheaf on the punctured, formal 2-disk. We then prove a local and universal form of the Grothendieck--Rieman--Roch theorem for families of…

Algebraic Geometry · Mathematics 2026-05-12 Zhengping Gui , Brian R. Williams

Utilising some recent ideas from our bilinear bi-parameter theory, we give an efficient proof of a two-weight Bloom type inequality for iterated commutators of linear bi-parameter singular integrals. We prove that if $T$ is a bi-parameter…

Classical Analysis and ODEs · Mathematics 2019-03-18 Kangwei Li , Henri Martikainen , Emil Vuorinen

We prove that if $F$ is a tangent to the identity diffeomorphism at $0\in\mathbb{C}^2$ and $\Gamma$ is a formal invariant curve of $F$ then there exists a parabolic curve (attracting or repelling) of $F$ asymptotic to $\Gamma$. The result…

Dynamical Systems · Mathematics 2020-02-20 Lorena López-Hernanz , Fernando Sanz Sánchez

Let $\mathbb{A}$ be a $2$-category with suitable opcomma objects and pushouts. We give a direct proof that, provided that the codensity monad of a morphism $p$ exists and is preserved by a suitable morphism, the factorization given by the…

Category Theory · Mathematics 2023-11-13 Fernando Lucatelli Nunes

We will announce two theorems. The first theorem will classify all topological types of degenerate fibers appearing in one-parameter families of Riemann surfaces, in terms of ``pseudoperiodic'' surface homeomorphisms. The second theorem…

Complex Variables · Mathematics 2016-09-06 Yukio Matsumoto , José Mariá Montesinos-Amilibia