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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.

168,695 papers · 148 categories

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103206308411 · Jun 202019922001200920172026
48 results for category classification

New NHCAs improve multi-category classification efficiency.

problem Efficient multi-category classification for real-world problems.
method Twin SVM (TWSVM), Generalized eigenvalue proximal SVM (GEPSVM), Regularized GEPSVM (RegGEPSVM), and Improved GEPSVM (IGEPSVM) with OAA, BT, and TDS approaches.
result TDS-TWSVM outperforms other methods in classification accuracy.

We classify all fusion categories for a given set of fusion rules with three simple object types. If a conjecture of Ostrik is true, our classification completes the classification of fusion categories with three simple object types. To facilitate the discussion we describe a convenient, concrete and useful variation o…

2007-04-02abs ↗pdf ↗

Deep Neural Networks, and specifically fully-connected convolutional neural networks are achieving remarkable results across a wide variety of domains. They have been trained to achieve state-of-the-art performance when applied to problems such as speech recognition, image classification, natural language processing an…

2017-02-06abs ↗pdf ↗

The category of small covariant functors from simplicial sets to simplicial sets supports the projective model structure. In this paper we construct various localizations of the projective model structure and also give a variant for functors from simplicial sets to spectra. We apply these model categories in the study …

2006-01-10abs ↗pdf ↗

To the best of our knowledge, this paper presents the first large-scale study that tests whether network categories (e.g., social networks vs. web graphs) are distinguishable from one another (using both categories of real-world networks and synthetic graphs). A classification accuracy of 94.2%94.2\% was achieved using a …

2017-09-13abs ↗pdf ↗

The abstract defines G2G_2-structures and connects them to octonion algebras.

problem Classifying G2G_2-structures and understanding their geometric properties.
method Established an isomorphism between G2G_2-structures and octonion algebras over C(M)C^\infty(M).
result The classification of G2G_2-structures agrees with a parametrisation of octonion algebras with isometric norm.

Developed a neural topic model for classifying COVID-19 disinformation.

problem Tackles the challenge of disinformation during the COVID-19 pandemic.
method Classification-aware neural topic model (CANTM) for COVID-19 disinformation.
result Demonstrated the effectiveness of CANTM in classifying COVID-19 disinformation.

Study braid group actions on exceptional sequences using branched coverings.

problem Transitivity of braid group action on full exceptional sequences.
method Relate exceptional sequences to branched coverings, apply Birman--Hilden theory.
result Counterexamples to Bondal--Polishchuk conjecture on braid group transitivity.

Automated recognition and classification of bacteria species from microscopic images have significant importance in clinical microbiology. Bacteria classification is usually carried out manually by biologists using different shapes and morphologic characteristics of bacteria species. The manual taxonomy of bacteria typ…

2019-12-04abs ↗pdf ↗

This paper proposes a multi-layer neural network structure for few-shot image recognition of novel categories. The proposed multi-layer neural network architecture encodes transferable knowledge extracted from a large annotated dataset of base categories. This architecture is then applied to novel categories containing…

2019-12-10abs ↗pdf ↗

Even in the absence of any explicit semantic annotation, vast collections of audio recordings provide valuable information for learning the categorical structure of sounds. We consider several class-agnostic semantic constraints that apply to unlabeled nonspeech audio: (i) noise and translations in time do not change t…

2017-11-06abs ↗pdf ↗

Torsion objects of von Neumann categories describe the phenomen "spectrum near zero" discovered by S. Novikov and M. Shubin. In this paper we classify Hermitian forms on torsion objects of a finite von Neumann category. We prove that any such form can be represented as a discriminant form of a degenerate Hermitian form…

1999-03-23abs ↗pdf ↗

The paper tackles confidence calibration for exploratory machine learning problems.

problem Difficulty in curating datasets and confusion about category validity.
method Introduces four new algorithms for category-specific confidence estimation, including kernel density ratios.
result Kernel density ratios provide a novel approach to confidence calibration, especially for exploratory problems.

This paper proposes a zero-shot learning approach for audio classification based on the textual information about class labels without any audio samples from target classes. We propose an audio classification system built on the bilinear model, which takes audio feature embeddings and semantic class label embeddings as…

2019-05-06abs ↗pdf ↗

FiberNet integrates geometry into machine learning for clearer classification.

problem Lack of interpretability in traditional deep learning.
method Reformulates classification as geometric optimization on fiber bundles, introducing learnable Riemannian metrics and variational prototype optimization.
result Clear geometric interpretability and efficiency in classification.

Attribute-aware CF models aims at rating prediction given not only the historical rating from users to items, but also the information associated with users (e.g. age), items (e.g. price), or even ratings (e.g. rating time). This paper surveys works in the past decade developing attribute-aware CF systems, and discover…

2018-10-20abs ↗pdf ↗

Unified framework connects deformation theory and derived categories for multiparameter persistence.

problem Algebraic complexity of multiparameter persistence modules hinders classification, stability, and interpretability.
method Combines deformation theory and derived categories to study multiparameter persistence geometrically.
result Unified conjecture relating interleaving distance to derived convolution metrics established.

The paper classifies extensions of Yang-Mills-type theories and their spaces.

problem Classifying extensions of Yang-Mills-type theories with arbitrary pairings.
method Using a unified approach, the space of extensions is classified and compared with Yang-Mills theories.
result An upper bound to the rank of the space of extensions is given and compared with Yang-Mills theories.

Classification with a large number of classes is a key problem in machine learning and corresponds to many real-world applications like tagging of images or textual documents in social networks. If one-vs-all methods usually reach top performance in this context, these approaches suffer from a high inference complexity…

2019-06-24abs ↗pdf ↗

Constructs 2-vector bundles and 2K-theory for Lie groupoids and 2-equivariant settings.

problem Developing a theory of 2-vector bundles and 2K-theory for Lie groupoids and their equivariant versions.
method Defines 2-vector bundles over Lie groupoids, constructs 2K-theory as Grothendieck completion, and proves classification theorems.
result Establishes an equivalence between homotopy categories of 2-vector bundles and simplicial maps, and computes 2-equivariant 2K-theories for specific Lie groups.

Mammographic breast density, a parameter used to describe the proportion of breast tissue fibrosis, is widely adopted as an evaluation characteristic of the likelihood of breast cancer incidence. In this study, we present a radiomics approach based on residual learning for the classification of mammographic breast dens…

2018-09-21abs ↗pdf ↗

Controversies around race and machine learning have sparked debate among computer scientists over how to design machine learning systems that guarantee fairness. These debates rarely engage with how racial identity is embedded in our social experience, making for sociological and psychological complexity. This complexi…

2018-11-28abs ↗pdf ↗

We have successfully implemented the "Learn to Pay Attention" model of attention mechanism in convolutional neural networks, and have replicated the results of the original paper in the categories of image classification and fine-grained recognition.

2018-12-11abs ↗pdf ↗

Improved security of smart contracts by classifying them into four categories.

problem Detecting and classifying vulnerabilities in smart contracts efficiently.
method Used AWD-LSTM for multi-class classification, addressing class imbalance.
result Achieved a weighted average Fbeta score of 90.0%.

In this paper, we introduce the notion of maximal actions of compact tori on smooth manifolds and study compact connected complex manifolds equipped with maximal actions of compact tori. We give a complete classification of such manifolds, in terms of combinatorial objects, which are triples (Δ,h,G)(Δ, \mathfrak{h}, G) of n…

2013-02-04abs ↗pdf ↗

We study holomorphic discs with boundary on a Lagrangian submanifold LL in a Kaehler manifold admitting a Hamiltonian action of a group KK which has LL as an orbit. We prove various transversality and classification results for such discs which we then apply to the case of a particular Lagrangian in CP3\mathbf{CP}^3

2014-01-16abs ↗pdf ↗

We introduce the category of holomorphic string algebroids, whose objects are Courant extensions of Atiyah Lie algebroids of holomorphic principal bundles, as considered by Bressler, and whose morphisms correspond to inner morphisms of the underlying holomorphic Courant algebroids in the sense of Severa. This category …

2018-07-26abs ↗pdf ↗

This paper proposes a method to reduce complexity in GLMs with categorical predictors.

problem Wasteful, hard-to-interpret, and prone to overfitting of traditional one-hot encoding for high-cardinality categorical predictors.
method Clustering categories of categorical predictors through a numerical method that preserves or improves accuracy while reducing the number of coefficients.
result Clustering categories of categorical predictors reduces complexity substantially without harming accuracy.

The Wallenius distribution is a generalisation of the Hypergeometric distribution where weights are assigned to balls of different colours. This naturally defines a model for ranking categories which can be used for classification purposes. Since, in general, the resulting likelihood is not analytically available, we a…

2017-01-27abs ↗pdf ↗

This work assesses DNNs for estimating conditional probabilities.

problem Lack of uncertainty characterization in DNNs for probabilistic applications.
method Investigates DNNs' ability to estimate conditional probabilities using synthetic and real-world datasets.
result DNNs' precision in estimating conditional probabilities is influenced by probability density and inter-categorical sparsity.

Proposes a multi-resolution model for prostate cancer classification using mpMRI.

problem Improving voxel-wise classification of prostate cancer using multi-parametric MRI data.
method Multi-resolution Super Learner framework combining local base learners at multiple resolutions and spatial Gaussian kernel smoothing.
result Enhanced voxel-wise classification of prostate cancer status and clinical significance.

Geometrically classifies total stability spaces for Dynkin diagrams.

problem Classifying total stability spaces for triangulated categories.
method Constructing a geometric model of root categories as hQh_Q-gons and proving isomorphisms.
result Total stability spaces ToStDb(Q)/[2]\mathrm{ToSt}\mathcal{D}^b(Q)/[2] are isomorphic to moduli spaces of stable hQh_Q-gons.