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arXiv research

A locally-built, LLM-digested index of recent arXiv papers in quant finance, geometry/topology, and statistical ML — keyword search served straight from SQLite on this machine.

169,236 papers · 148 categories

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48 results for Fano distributions

The paper extends statistical estimation techniques under differential privacy.

problem Establishing sample complexity bounds for estimation tasks under differential privacy.
method Proposes analogues of Le Cam's method, Fano's inequality, and Assouad's lemma under central differential privacy.
result Optimal sample complexity bounds for discrete distribution estimation under total variation and 2\ell_2 distances.

Proves Yau-Tian-Donaldson conjecture for certain singular Fano varieties.

problem Proving the conjecture for a specific class of singular Fano varieties.
method Using log smooth resolutions and K-polystability criteria.
result Kähler-Einstein metrics exist for K-polystable singular Fano varieties.

New methods for computing volumes and constructing Fano fibrations.

problem Understanding Fano fibrations and their weighted volumes.
method New methods for computing weighted volumes, including Laplace transforms and incomplete Gamma-functions. Conjectural construction of Fano fibrations.
result Conjectural construction of Fano fibrations with asymptotically conical bases from degenerating Fano fibrations.

The study examines K-polystability on Fano 4-folds with specific Lefschetz defects.

problem Investigating K-polystability on Fano 4-folds with Lefschetz defect at least 2.
method Examining 19 families of Fano 4-folds with Lefschetz defect 3 and 175 families with Lefschetz defect 2, proving K-polystability and instability.
result Exactly 5 out of 19 families of Fano 4-folds with Lefschetz defect 3 are K-polystable, and 5 out of 175 Casagrande-Druel Fano 4-folds with Lefschetz defect 2 are K-polystable.

Study of compactifications for Kähler-Einstein Fano manifolds.

problem Compactification of moduli spaces of Kähler-Einstein Fano manifolds.
method Geometry of metric tangent cones and algebro-geometric study of singularities.
result First concrete examples of Gromov-Hausdorff compactifications in complex dimensions >2.

Paper studies limits of Kähler-Ricci flow on Fano G-manifolds.

problem Analyzing the limits of Kähler-Ricci flow on Fano G-manifolds.
method Proves the Gromov-Hausdorff limit of Kähler-Ricci flow on Fano G-manifolds is a horosymmetric variety.
result The limit of Kähler-Ricci flow on Fano G-manifolds is a horosymmetric variety.

New toric Fano manifolds found without extremal Kähler metrics.

problem Finding toric Fano manifolds without extremal Kähler metrics.
method Constructing specific toric Fano manifolds of dimensions 10 and n (n≥11) that do not admit extremal Kähler metrics.
result Existence of toric Fano manifolds of dimension 10 and higher that do not admit extremal Kähler metrics.

Reductive automorphism groups for K-polystable Fano pairs proved.

problem Proving reductivity of automorphism groups for K-polystable Fano varieties.
method Establishing S-completeness and Θ-reductivity for moduli of K-semistable log Fano pairs, assuming K-semistability is open.
result K-polystable log Fano pairs have reductive automorphism groups.

The paper studies Kähler-Ricci flow on Fano manifolds and finds examples of type II singularities.

problem Analyzing the behavior of Kähler-Ricci flow on Fano manifolds.
method Proving the flow is of type II and finding specific examples.
result Found examples of Fano compactifications where Kähler-Ricci flow develops type II singularities.

Study proves most Fano threefolds are Kähler-Einstein.

problem Existence of Kähler-Einstein metrics on smooth Fano threefolds.
method Investigated smooth Fano threefolds of Picard rank one and anticanonical degree 22 with C\mathbb{C}^\ast action.
result Proved existence of Kähler-Einstein metrics on most such threefolds, except possibly two cases.

Constructs models for Fano threefolds using Lagrangian torus fibrations.

problem Models for Fano threefolds using Lagrangian torus fibrations.
method Toric degeneration for affine manifolds with singularities, correspondence between polytopes and Fano manifolds.
result Total space of each fibration is homeomorphic to the expected Fano threefold and numerical invariants coincide.

Study calculates volumes of Fano K-moduli spaces in various dimensions.

problem Computing volumes of Fano K-moduli spaces in different dimensions.
method Computed volumes of Fano K-moduli spaces of Quartic del Pezzo and log Fano hyperplane arrangements in dimensions one and two.
result Relates computed volumes to Weil-Petersson volumes, extending the Weil-Petersson metric to the log case.

Classifies Fano varieties with large pseudoindex and non-free rational curves.

problem Classifying Fano varieties with specific properties.
method Extremal contractions and classification of varieties.
result Complete classification of Fano nn-folds with pseudoindex at least n2n-2 and Picard number greater than one.

Existence of Kähler-Einstein metrics on compactifications of Lie groups.

problem Existence of Kähler-Einstein metrics on Q\mathbb Q-Fano compactifications of Lie groups.
method Proving existence through compactifications of Lie groups.
result Classification of Q\mathbb Q-Fano compactifications of SO4(C)SO_4(\mathbb C) with Kähler-Einstein metrics.

Study positive characteristic Fano 4-folds with nef tangent bundles.

problem Positive characteristic version of the Campana-Peternell conjecture for Fano 4-folds.
method Analyzes Fano 4-folds with nef tangent bundles in positive characteristic.
result Affirmative answer for Fano 4-folds with Picard number > 1 and nef tangent bundle.

The paper proves the openness of K-semistability for Fano varieties.

problem Stability of K-semistability in families of log Fano pairs.
method By showing the stability threshold is a constructible function and proving special test configurations arise from log canonical places.
result The stability threshold is a constructible function on fibers, and any minimizer of the stability threshold exists.

Counterexample disproves conjecture about Fano varieties with non-reductive automorphisms.

problem Disproving the conjecture about Loewy filtrations destabilizing non-reductive Fano varieties.
method Constructing a counterexample to the Loewy filtration conjecture.
result Found a Fano variety with non-reductive automorphism group that does not destabilize Loewy filtration.

The paper proves Mabuchi solitons and constants on Fano admissible manifolds.

problem Existence of Mabuchi solitons on Fano admissible manifolds.
method Defined Mabuchi solitons and constants, proved existence and non-existence.
result Fano admissible manifolds admit Mabuchi solitons if and only if the Mabuchi constant is less than 1.

New examples of Kähler-Ricci solitons on Fano threefolds with non-trivial moduli found.

problem Finding Fano threefolds with Kähler-Ricci solitons and non-trivial moduli.
method Established weighted K-stability and GIT-stability criteria, generalized Koiso's theorem, and developed the weighted Abban-Zhuang estimate.
result First examples of strictly weighted K-semistable Fano varieties and new examples of KRS Fano varieties with non-trivial moduli and small automorphism groups.

Paper shows convergence of Fano Kähler-Ricci solitons without uniform Futaki invariant bound.

problem Degeneration of Fano Kähler-Ricci solitons without uniform Futaki invariant bound.
method Improves Phong-Song-Sturm's result by removing the uniform bound assumption.
result Convergence of Fano Kähler-Ricci solitons to a Kähler-Ricci soliton on a Q-Fano variety with log terminal singularities.

We prove the existence of asymptotically cylindrical (ACyl) Calabi-Yau 3-folds starting with (almost) any deformation family of smooth weak Fano 3-folds. This allow us to exhibit hundreds of thousands of new ACyl Calabi-Yau 3-folds; previously only a few hundred ACyl Calabi-Yau 3-folds were known. We pay particular att…

2012-06-11abs ↗pdf ↗

New research confirms Kähler-Einstein metrics for all Fano threefolds of degree 22.

problem Identifying Fano threefolds of degree 22 with Kähler-Einstein metrics.
method Analyzing the structure and properties of Fano threefolds of Picard rank one with anti-canonical degree 22.
result All remaining Fano threefolds of degree 22 admit Kähler-Einstein metrics.

The study finds Kähler-Einstein metrics on certain Fano varieties of type AIII.

problem Finding Kähler-Einstein metrics on specific Fano varieties.
method Using combinatorial criteria for K-polystability and properties of Fano varieties.
result Proves existence of Kähler-Einstein metrics on XmX_m for m4m \geq 4 and on YmY_m for m=4,5m = 4, 5.

The paper shows how to destabilize unstable Fano varieties using stability thresholds.

problem Optimally destabilizing K-unstable Fano varieties.
method Using divisorial valuations and special test configurations to induce stability thresholds.
result Fano varieties degenerate to uniquely determined twisted K-polystable varieties.

Study of K-moduli of prime Fano threefolds of genus twelve, proving boundary purely divisorial.

problem Understanding the boundary of K-moduli of prime Fano threefolds of genus twelve.
method Developed a modular relation between Fano threefolds and their anticanonical K3 surfaces, proving forgetful morphism is an open immersion.
result Proved the boundary of K-moduli of V22V_{22} is purely divisorial and consists of four irreducible components.