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Related papers: Subadjunction theorem for pluricanonical divisors

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We investigate several categories related to transition structures, using a mixture of algebraic and topological methods. We show how two such categories are connected by a contravariant adjunction. This is the most detailed of a family of…

Category Theory · Mathematics 2026-04-16 Matthew Collinson

We prove that the abundance conjecture holds on a variety $X$ with mild singularities if $X$ has many reflexive differential forms with coefficients in pluricanonical bundles, assuming the Minimal Model Program in lower dimensions. This…

Algebraic Geometry · Mathematics 2025-08-22 Vladimir Lazić , Thomas Peternell

The Subspace Theorem is a powerful tool in number theory. It has appeared in various forms and been adapted and improved over time. It's applications include diophantine approximation, results about integral points on algebraic curves and…

Combinatorics · Mathematics 2013-11-18 Ryan Schwartz , Jozsef Solymosi

The concept of (p,q)-pair frames is generalized to (l,l^*)-pair frames. Adjoint (conjugate) of a pair frames for dual space of a Banach space is introduced and some conditions for the existence of adjoint (conjugate) of pair frames are…

Functional Analysis · Mathematics 2012-08-10 Abolhassan Fereydooni , Ahmad Safapour , Asghar Rahimi

We explain how to deduce from recent results in the Minimal Model Program a general uniruledness theorem for base loci of adjoint divisors. We also show how to recover special cases by extending a technique introduced by Takayama.

Algebraic Geometry · Mathematics 2010-03-03 S. Boucksom , A. Broustet , G. Pacienza

We prove a part of Shokurov's conjecture on characterization of toric varieties modulo the minimal model program and adjunction conjecture.

Algebraic Geometry · Mathematics 2010-05-06 Yuri G. Prokhorov

We extend a subadjunction formula of log canonical divisors as in [K3] to the case when the codimension of the minimal center is arbitrary by using the positivity of the Hodge bundles.

alg-geom · Mathematics 2007-05-23 Yujiro Kawamata

This second part comes to the construction of the spectrum associated to a situation of multi-adjunction. Exploiting a geometric understanding of its multi-versal property, the spectrum of an object is obtained as the spaces of local units…

Category Theory · Mathematics 2021-04-07 Axel Osmond

In this short note, we prove a Tamarkin-type separation theorem for possibly non-compact subsets in cotangent bundles.

Symplectic Geometry · Mathematics 2025-07-01 Yuichi Ike , Tatsuki Kuwagaki

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 establish a kind of subadjunction formula for quasi-log canonical pairs. As an application, we prove that a connected projective quasi-log canonical pair whose quasi-log canonical class is anti-ample is simply connected and rationally…

Algebraic Geometry · Mathematics 2020-09-02 Osamu Fujino

We describe dual notions of tangent bundle for an infinity-topos, each underlying a tangent infinity-category in the sense of Bauer, Burke and the author. One of those notions is Lurie's tangent bundle functor for presentable…

Category Theory · Mathematics 2021-01-25 Michael Ching

This paper is concerned with the characterizations of quasi self-adjoint extensions of a class of formally non-self-adjoint discrete Hamiltonian systems. Some properties of the solutions and the characterization of the minimal linear…

Spectral Theory · Mathematics 2025-12-11 Guojing Ren , Guixin Xu

In generalization of knot quandles we introduce similar algebraic structures associated with arbitrary pairs consisting of a path-connected topological space and its path-connected subspace.

Geometric Topology · Mathematics 2022-05-16 Vladimir Turaev

We study quotients of multi-graded bundles, including double vector bundles. Among other things, we show that any such quotient fits into a tower of affine bundles. Applications of the theory include a construction of normal bundles for…

Differential Geometry · Mathematics 2024-11-28 Eckhard Meinrenken

For linear flows on vector bundles, it is analyzed when subbundles in the Selgrade decomposition yield chain transitive subsets for the induced flow on the associated Poincar\'e sphere bundle.

Dynamical Systems · Mathematics 2022-12-13 Fritz Colonius

We prove the abundance theorem for numerically trivial log canonical divisors of log canonical pairs and semi-log canonical pairs.

Algebraic Geometry · Mathematics 2010-09-14 Yoshinori Gongyo

In this paper, we aim to provide a notion of "relative objects", i.e. objects equipped with some sort of subobjects, in differential topology. In spite of active researches relating them, e.g. knot theory or the theory of manifolds with…

Geometric Topology · Mathematics 2017-03-08 Jun Yoshida

Let M be a Q-divisor on a smooth surface over C. In this paper we give criteria for very ampleness of the adjoint of the round-up of M. (Similar results for global generation were given by Ein and Lazarsfeld and used in their proof of…

alg-geom · Mathematics 2016-08-30 Vladimir Masek

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