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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.

169,341 papers · 148 categories

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8152330 · Jul 202019922001200920182026
48 results for category transplantation

New method transplants specific neural networks to generic ones without training samples.

problem Learning massive tasks and categories requires collecting samples for all at once.
method Designs a functionally interpretable generic network and uses back-distillation for transplanting.
result Method without training samples outperforms with 100 samples.

We say that a germ G of a geometric structure can be transplanted into a manifold M if there is a suitable geometric structure on M which agrees with G on a neighborhood of some point P of M. We show for a wide variety of geometric structures that this transplantation is always possible provided that M does in fact adm…

2013-01-15abs ↗pdf ↗

Paper learns data-driven organ matching rules from observational data.

problem Tackles organ transplantation compatibility using observational data.
method Representation learning to cluster donors and apply recipient transformations.
result Model outperforms human experts in predicting transplant outcomes.

Liver transplant patients have a 25% chance of developing diabetes within 5 years.

problem Predicting new onset diabetes after liver transplant to improve patient care.
method Comparison of time-to-event prediction models and classifiers, including regularized Cox proportional-hazards model.
result Regularized Cox proportional-hazards model achieved high Concordance Index of 0.863.

Method learns evolving policies in healthcare contexts.

problem Understanding non-stationary behavior in evolving decision-making processes.
method Inverse Contextual Bandits (ICB) approach for learning interpretable representations of non-stationary behavior.
result Demonstrated applicability and accuracy of ICB method in liver transplantation policies.

Paper uses deep reinforcement learning for personalized medical treatment recommendations.

problem Personalized treatment recommendations for medical conditions.
method Deep reinforcement learning framework for dynamic treatment regimes.
result Demonstrated promising accuracy in predicting expert decisions and expected rewards.

New method for finding optimal treatment regimes in medical settings with time-varying unobserved factors.

problem Finding optimal treatment regimes in medical settings with time-varying unobserved factors.
method Extend Dynamic Treatment Regimes (DTRs) to Ambiguous Dynamic Treatment Regimes (ADTRs), connect to Ambiguous Partially Observable Mark Decision Processes (APOMDPs), and develop Reinforcement Learning methods.
result Established theoretical results for learning methods, including consistency and asymptotic normality.

We prove that C. Loewner's inequality for the torus is satisfied by all hyperelliptic surfaces X, as well. We first construct the Loewner loops on the (mildly singular) companion tori, locally isometric to X away from the Weierstrass points. The loops are then transplanted to X, and surgered to obtain a Loewner loop on…

2004-07-01abs ↗pdf ↗

The paper finds an upper bound for the first eigenvalue of the Kohn-Laplace operator in the Heisenberg group.

problem Finding an upper bound for the first eigenvalue of the Kohn-Laplace operator in the Heisenberg group.
method Using harmonic transplantation and harmonic radius, the paper extends P.Pansu's results to give an upper bound for the first eigenvalue of the Dirichlet problem.
result The first eigenvalue is bounded by a function of the domain's volume, perimeter, and harmonic radius.

Paper presents an ensemble model for predicting readmission using clinical notes.

problem Limited use of clinical notes in predicting readmission due to their unstructured nature.
method Ensemble model combining vector space modeling and topic modeling.
result Improves readmission prediction by 0.0211 in c-statistics.

The paper introduces methods to analyze community data using diffusion Frechet functions.

problem Analyzing complex ecosystems and their interactions.
method Developed methods for modeling and analyzing the organization of complex data across spatial scales.
result Introduced diffusion Frechet functions and vectors for robustly describing the shapes of probability distributions.

Introduction. Case Based Reasoning (CBR) is an emerg- ing decision making paradigm in medical research where new cases are solved relying on previously solved similar cases. Usually, a database of solved cases is provided, and every case is described through a set of attributes (inputs) and a label (output). Extracting…

2013-03-07abs ↗pdf ↗

Given a hyperelliptic Klein surface, we construct companion Klein bottles, extending our technique of companion tori already exploited by the authors in the genus 2 case. Bavard's short loops on such companion surfaces are studied in relation to the original surface so to improve a systolic inequality of Gromov's. A ba…

2012-01-01abs ↗pdf ↗

The paper examines how macroeconomic control tools lost effectiveness, leading to a 'dark ages' period.

problem Loss of effectiveness of control tools in macroeconomic stabilization policy.
method Historical analysis of macroeconomic stabilization policy from 1948 to 1993.
result The overstatement of the Lucas critique and Kydland and Prescott's time-inconsistency led to a period of ineffective stabilization policy.

Survey on decorated marked surfaces for Calabi-Yau categories.

problem Understanding Calabi-Yau categories and related structures.
method Introducing decorations on marked surfaces to study various categories.
result Exploration of Calabi-Yau-2 and 3 categories, braid groups, quadratic differentials, and stability conditions.

The paper defines new TQFTs from non-semisimple categories and proves spherical categories are chromatic.

problem Defining non-compact TQFTs from non-semisimple categories.
method Introducing admissible skein modules, chromatic categories, and using Juhász's cobordism presentation.
result Non-compact (2+1)-TQFTs can be defined from chromatic categories, extending Turaev-Viro TQFTs.

Categorifies quantum invariants using cobordism categories and operads.

problem Categorify quantum invariants using cobordism categories and operads.
method Constructs a cobordism category with a colored operad action, categorifies quantum slnsl_n invariants.
result Consistency of the cobordism category and explicit functor to matrix factorizations conjectured.

ETQFTs created from non-semisimple modular categories.

problem Constructing ETQFTs from non-semisimple modular categories.
method Explicitly identify linear categories and functors in the image of ETQFTs constructed from modular categories.
result The circle category of ETQFTs is equivalent to the full subcategory of projective objects of the underlying modular category, which need not be semisimple.

We compare various different definitions of "the category of smooth objects". The definitions compared are due to Chen, Frölicher, Sikorski, Smith, and Souriau. The method of comparison is to construct functors between the categories that enable us to see how the categories relate to each other. This produces a diagram…

2008-02-15abs ↗pdf ↗

New 4-manifold invariant defined from trisection diagrams.

problem Defining a new 4-manifold invariant from trisection diagrams.
method Algebraic data from bimodule categories and spherical fusion categories, described diagrammatically.
result Includes Hopf algebraic invariants and modular fusion category invariants.

We study the transverse Lusternik-Schnirelmann category of a Riemannian foliation on a compact manifold. We obtain a necessary and sufficient condition when the transverse LS category is finite. We also introduce a variation on the concept of transverse LS category, the essential transverse category, and show that this…

2007-04-26abs ↗pdf ↗

We investigate the relationship between the algebra of tensor categories and the topology of framed 3-manifolds. On the one hand, tensor categories with certain algebraic properties determine topological invariants. We prove that fusion categories of nonzero global dimension are 3-dualizable, and therefore provide 3-di…

2013-12-27abs ↗pdf ↗

Paper proposes CNE-net to tackle incremental learning in (T)ACSA tasks.

problem Catastrophic forgetting in multi-task incremental learning for (T)ACSA.
method Category Name Embedding network (CNE-net) with shared encoder and decoder.
result State-of-the-art performance on (T)ACSA benchmark datasets.

TXtract extracts structured knowledge from thousands of product categories.

problem Extracting structured knowledge from diverse product categories in e-commerce.
method TXtract uses a taxonomy-aware model with category conditional self-attention and multi-task learning.
result TXtract outperforms state-of-the-art approaches by up to 10% in F1 and 15% in coverage across all categories.