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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.

168,742 papers · 148 categories

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48 results for statistical relational models

This paper characterizes projective models in statistical relational learning.

problem Projectivity in statistical relational models is beneficial for inference and learning.
method Representation theorems for infinite exchangeable arrays to characterize projective models.
result A class of directed graphical latent variable models correspond to projective relational models.

Paper discusses the Fisher metric and differentiability in statistical models.

problem Understanding the relationship between Fisher metric and differentiability in statistical models.
method Comparison of different concepts and models in Information Geometry, mathematical statistics, and measure theory.
result Discussion of various models and their differentiability properties.

Proposes a new tensor factorization model for better link prediction in knowledge graphs.

problem Lack of information in treating missing and non-existing relations equally in tensor factorization models.
method Introduces a binary tensor factorization model with probit link to address the issue.
result Shows improved prediction accuracy and interpretability compared to existing models.

Relational machine learning studies methods for the statistical analysis of relational, or graph-structured, data. In this paper, we provide a review of how such statistical models can be "trained" on large knowledge graphs, and then used to predict new facts about the world (which is equivalent to predicting new edges…

2015-03-02abs ↗pdf ↗

Researchers formalize PD and PFI to relate them to data generating process.

problem Lack of theory linking PD and PFI to data generating process.
method Formalize PD and PFI as estimators of ground truth estimands, account for model variance with learner-PD and learner-PFI.
result PD and PFI estimates deviate from ground truth due to statistical biases, model variance, and Monte Carlo approximation errors.

Study on lightlike geometry in indefinite Sasakian statistical manifolds.

problem Exploring lightlike hypersurfaces and their properties in indefinite Sasakian statistical manifolds.
method Introducing indefinite Sasakian statistical manifolds and analyzing lightlike hypersurfaces with respect to dual connections.
result An invariant lightlike submanifold of an indefinite Sasakian statistical manifold is itself an indefinite Sasakian statistical manifold.

New algebraic geometry and statistical manifold connections proven.

problem Understanding the structure of statistical manifolds and their algebraic properties.
method Developed relations between algebraic geometry, information theory, and Topological Field Theory.
result Statistical pre-Frobenius manifolds form algebraic varieties and have hexagonal, isoclinic webs.

This paper studies semi-supervised object classification in relational data, which is a fundamental problem in relational data modeling. The problem has been extensively studied in the literature of both statistical relational learning (e.g. relational Markov networks) and graph neural networks (e.g. graph convolutiona…

2019-05-15abs ↗pdf ↗

The paper extends statistical inference methods for black-box generative models.

problem Understanding and validating black-box generative models without access to their internal data.
method Develops model-level statistical inference tasks using generative model representations.
result Model-level representations are effective for multiple inference tasks.

Introduces a new geometric structure for statistical manifolds with degenerate metrics.

problem Degenerate metrics in statistical manifolds affect geometric structures and applications.
method Introduces quasi-Codazzi structure for degenerate metrics and coherent tangent bundles.
result Generalizes geometric structures and relations for statistical models with degenerate metrics.

Paper establishes identifiability conditions for a model with two latent vectors and auxiliary data.

problem Identifying conditions for a statistical model with two latent vectors and auxiliary data.
method Proposes a statistical model with two latent vectors and auxiliary data, establishing various identifiability conditions.
result Identifiability conditions reveal a dimensionality relation and link model indeterminacies to maximum link weights.

Researchers derive the relation between temperature and volatility in ideal agent systems.

problem Deriving the exact algebraic relation between temperature and volatility in ideal agent systems.
method Analogy with spin systems from statistical physics.
result Derive the exact algebraic relation between temperature and volatility for an ideal agent system.

The differential geometry of Kenmotsu manifold is a valuable part of contact geometry with nice applications in other fields such as theoretical physics. In fact, its statistical counterpart, that is, Kenmotsu statistical manifold also has same importance as that of Kenmotsu manifold. Theoretical physicists have also b…

2019-05-30abs ↗pdf ↗

Statistical learning theory connects to spin glass models via Rademacher complexity and replica theory.

problem Bounding generalization gap in statistical learning theory.
method Linking Rademacher complexity in statistical learning to synthetic models in statistical physics.
result Rademacher complexity is closely related to ground state energy in spin glass models.

Study invariant connections on multivariate Gaussian distributions.

problem Understanding statistical connections on multivariate Gaussian distributions.
method Investigate invariant connections on N0n\mathcal{N}_0^n with the Fisher metric.
result Explicitly determined invariant connections and their moduli spaces.

Poly-view contrastive learning improves image representation learning.

problem Learning representations from multiple related views in image data.
method Developed new representation learning objectives for poly-view tasks using information maximization and sufficient statistics.
result Poly-view contrastive models trained for fewer epochs and with smaller batch sizes outperform models trained for more epochs and with larger batch sizes.

Canonical correlation analysis is a family of multivariate statistical methods for the analysis of paired sets of variables. Since its proposition, canonical correlation analysis has for instance been extended to extract relations between two sets of variables when the sample size is insufficient in relation to the dat…

2017-11-07abs ↗pdf ↗

Signals consisting of a sequence of pulses show that inherent origin of the 1/f noise is a Brownian fluctuation of the average interevent time between subsequent pulses of the pulse sequence. In this paper we generalize the model of interevent time to reproduce a variety of self-affine time series exhibiting power spec…

2003-03-05abs ↗pdf ↗

Overview of high-dimensional time series regression methods.

problem Estimation and inference with high-dimensional time series data.
method Limit theory for high-dimensional dependent data, asymptotic theory for time series regression, statistical learning methods.
result Main limit theory results and asymptotic theory for high-dimensional time series regression.

Risk statistic is a critical factor not only for risk analysis but also for financial application. However, the traditional risk statistics may fail to describe the characteristics of regulator-based risk. In this paper, we consider the regulator-based risk statistics for portfolios. By further developing the propertie…

2019-04-16abs ↗pdf ↗

Time series of counts arise in a variety of forecasting applications, for which traditional models are generally inappropriate. This paper introduces a hierarchical Bayesian formulation applicable to count time series that can easily account for explanatory variables and share statistical strength across groups of rela…

2014-05-15abs ↗pdf ↗

Proposes a framework for automated radiation therapy treatment planning with uncertainty quantification.

problem Quantifying uncertainties in dose-related quantities for automated treatment planning.
method Three-step pipeline: feature extraction, dose statistic prediction, and dose mimicking.
result Probabilistic treatment plans agree better with clinical counterparts than non-probabilistic ones.

Lightlike hypersurfaces of a statistical manifold are studied. It is shown that a lightlike hypersurface of a statistical manifold is not a statistical manifold with respect to the induced connections, but the screen distribution has a canonical statistical structure. Some relations between induced geometric objects wi…

2019-01-26abs ↗pdf ↗

The paper discusses safety assessment for AI systems, focusing on machine learning models.

problem Safety assessment of AI systems, especially machine learning models, in safety-related applications.
method Analyzed AI models as statistical models and proposed a new budget allocation for AI safety.
result Safety assessment of AI systems requires a new approach focusing on the model used, not just the system.

Algorithm learns causal structures from time-series data, reducing tests for temporal vs. contemporaneous relations.

problem Learning causal structures from time-series data with latent confounders.
method Constraint-based algorithm that refines a causal graph by learning temporal relations first, then contemporaneous ones.
result Reduces the number of statistical tests and improves accuracy for synthetic and real-world data.

New test determines appropriate number of biclusters in relational data.

problem Determining the correct number of biclusters in relational data matrices.
method Proposes a new statistical test that does not require regular-grid assumptions.
result Derives asymptotic behavior of the test statistic for both null and alternative cases.

This paper derives -- considering a Gaussian setting -- closed form solutions of the statistics that Adrian and Brunnermeier and Acharya et al. have suggested as measures of systemic risk to be attached to individual banks. The statistics equal the product of statistic specific Beta-coefficients with the mean corrected…

2012-11-17abs ↗pdf ↗

Statistical relational AI (StarAI) aims at reasoning and learning in noisy domains described in terms of objects and relationships by combining probability with first-order logic. With huge advances in deep learning in the current years, combining deep networks with first-order logic has been the focus of several recen…

2017-12-07abs ↗pdf ↗

As machine learning becomes more pervasive, there is an urgent need for interpretable explanations of predictive models. Prior work has developed effective methods for visualizing global model behavior, as well as generating local (instance-specific) explanations. However, relatively little work has addressed regional …

2019-04-01abs ↗pdf ↗

The paper proposes using Autoencoders to learn summary statistics for Bayesian inference.

problem Approximating posterior distributions for models with intractable likelihood functions.
method Using Autoencoders to extract summary statistics that retain parameter information and cancel noise.
result The approach effectively learns summary statistics that improve posterior approximation.

Neuroimaging research has predominantly drawn conclusions based on classical statistics, including null-hypothesis testing, t-tests, and ANOVA. Throughout recent years, statistical learning methods enjoy increasing popularity, including cross-validation, pattern classification, and sparsity-inducing regression. These t…

2016-03-06abs ↗pdf ↗

A new method uses preference relations to reconcile contradictory trading signals from multiple securities.

problem Difficulty in exploiting multiple pairs trading signals due to contradictions.
method Proposes a portfolio construction method based on preference relation graphs to reconcile contradictory signals.
result Portfolios based on preference relations exhibit robust returns even with high transaction costs and improve with more securities considered.

The notion of the stationary equilibrium ensemble has played a central role in statistical mechanics. In machine learning as well, training serves as generalized equilibration that drives the probability distribution of model parameters toward stationarity. Here, we derive stationary fluctuation-dissipation relations t…

2018-09-28abs ↗pdf ↗