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We consider substitutions on compact alphabets and provide sufficient conditions for the diffraction to be pure point, absolutely continuous and singular continuous. This allows one to construct examples for which the Koopman operator on…

Dynamical Systems · Mathematics 2022-09-08 Neil Mañibo , Dan Rust , James J. Walton

We prove a conjecture of Griffiths on simultaneous normalization of all periods which asserts that the image of the lifted period map on the universal cover lies in a bounded domain in a complex Euclidean space. As an application we prove…

Algebraic Geometry · Mathematics 2026-02-19 Kefeng Liu , Yang Shen

We give a complete proof of a propagation theorem of multiplicity-free property from fibers to spaces of global sections for holomorphic vector bundles. The propagation theorem is formalised in three ways, aiming for producing various…

Representation Theory · Mathematics 2013-08-14 Toshiyuki Kobayashi

We extended the study of the linear fractional self maps (e.g. by Cowen-MacCluer and Bisi-Bracci on the unit balls) to a much more general class of domains, called generalized type-I domains, which includes in particular the classical…

Complex Variables · Mathematics 2019-10-15 Yun Gao , Sui-Chung Ng , Aeryeong Seo

We consider moduli spaces of dynamical systems of correspondences over the projective line as a generalization of moduli spaces of dynamical systems of endomorphisms on the projective line. We obtain the rationality of the moduli spaces.…

Dynamical Systems · Mathematics 2021-09-15 Rin Gotou

The injective spectrum is a topological space associated to a ring $R$, which agrees with the Zariski spectrum when $R$ is commutative noetherian. We consider injective spectra of right noetherian rings (and locally noetherian Grothendieck…

Rings and Algebras · Mathematics 2019-08-19 Harry Gulliver

Given a canonical algebraically integrable foliation on a klt projective variety, we study the variation of the ample models of the associated adjoint foliated structures with respect to the parameter. When the foliation is of general type,…

Algebraic Geometry · Mathematics 2025-10-06 Paolo Cascini , Jihao Liu , Fanjun Meng , Roberto Svaldi , Lingyao Xie

We consider the Hamiltonian for a charged particle in a harmonic potential in the presence of a magnetic field. The most symmetric case depends on one parameter, the variation of which leads from a spectrum bounded from below to an…

Quantum Physics · Physics 2019-09-11 Francisco M. Fernández

A ring R is called right principally-injective if every R-homomorphism from a principal right ideal aR to R (a in R), extends to R, or equivalently if every system of equations xa=b (a, b in R) is solvable in R. In this paper we show that…

Rings and Algebras · Mathematics 2018-07-19 Soumitra Das , Ardeline M. Buhphang

In this paper we consider the Prym map for double coverings of curves of genus $g$ ramified at $r>0$ points. That is, the map associating to a double ramified covering its Prym variety. The generic Torelli theorem states that the Prym map…

Algebraic Geometry · Mathematics 2021-04-20 Juan Carlos Naranjo , Angela Ortega , Alesandro Verra

Definable continuous injective maps defined on definable open sets into the Euclidean spaces of the same dimension are open maps in definably complete locally o-minimal expansions of ordered groups.

Logic · Mathematics 2026-01-27 Masato Fujita

The degree sequence of the algebraic numbers in an algebraic linear recurrence sequence is shown to be virtually periodic. This is proved using the Skolem-Mahler-Lech theorem. It has applications to the degree sequence and the minimal…

Number Theory · Mathematics 2020-10-01 Daqing Wan , Hang Yin

It is shown that in dimension at least three a local diffeomorphism of Euclidean n-space into itself is injective provided that the pull-back of every plane is a Riemannian submanifold which is conformal to a plane. Using a similar…

Differential Geometry · Mathematics 2020-03-02 Frederico Xavier

We present the following result: consider the space of complex polynomials of degree n>2 with n-1 distinct marked periodic orbits of given periods. Then this space is irreducible and the multipliers of the marked periodic orbits considered…

Dynamical Systems · Mathematics 2013-10-28 Igors Gorbovickis

We expose in detail the principle that the relative geometric invariant theory of equivariant morphisms is related to the GIT for linearizations near the boundary of the $G$-effective ample cone. We then apply this principle to construct…

alg-geom · Mathematics 2008-02-03 Yi Hu

In a variety of contexts, we prove that singular continuous spectrum is generic in the sense that for certain natural complete metric spaces of operators, those with singular spectrum are a dense $G_\delta$.

Spectral Theory · Mathematics 2008-02-03 Rafael del Rio , Svetlana Ya. Jitomirskaya , Nikolai G. Makarov , Barry Simon

This paper describes the structure of the moduli space of holomorphic curves and constructs Gromov Witten invariants in the category of exploded manifolds. This includes defining Gromov Witten invariants relative to normal crossing divisors…

Symplectic Geometry · Mathematics 2011-02-02 Brett Parker

We prove that an asymptotically linear Hamiltonian diffeomorphism of the standard symplectic vector space, which is non-degenerate and unitary at infinity and approaches its linear map at infinity quickly enough, has infinitely many…

Symplectic Geometry · Mathematics 2026-04-21 Leonardo Masci

We study homological multiplicities of spherical varieties of reductive group $G$ over a $p$-adic field $F$. Based on Bernstein's decomposition of the category of smooth representations of a $p$-adic group, we introduce a sheaf that…

Representation Theory · Mathematics 2017-09-29 Avraham Aizenbud , Eitan Sayag

In this paper, we show an extension type theorem for twisted pluricanonical sections on a family of smooth projective manifolds (the twisting line bundle being pseudo-effective and having a prescribed multiplier ideal on the central fiber).

Algebraic Geometry · Mathematics 2016-08-16 Benoît Claudon