Constraint stability in permutations and action traces
April 15, 2023
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Mathematics
Group Theory
Functional Analysis
Operator Algebras
Group Theory
Functional Analysis
Operator Algebras
An action trace is a function naturally associated to a probability measure
preserving action of a group on a standard probability space. For countable
amenable groups, we characterise stability in permutations using action traces.
We exten...
Test-Optional Admissions
April 15, 2023
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Economics
Theoretical Economics
Theoretical Economics
Many U.S. colleges now use test-optional admissions. A frequent claim is that
by not seeing standardized test scores, a college can admit a student body it
prefers, say with more diversity. But how can observing less information
improve dec...
Towards a generic absoluteness theorem for Chang models
April 15, 2023
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Mathematics
Logic
Let Γ∞ be the set of all universally Baire sets of reals.
Inspired by recent work of the second author and Nam Trang, we introduce a new
technique for establishing generic absoluteness results for models containing
$\Gamma^\inf...
Efficient Convex Algorithms for Universal Kernel Learning
April 15, 2023
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Statistics
Computer Science
Machine Learning
Machine Learning
The accuracy and complexity of machine learning algorithms based on kernel
optimization are determined by the set of kernels over which they are able to
optimize. An ideal set of kernels should: admit a linear parameterization (for
tractabi...
IP-FL: Incentive-driven Personalization in Federated Learning
April 15, 2023
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Computer Science
Machine Learning
Artificial Intelligence
Existing incentive solutions for traditional Federated Learning (FL) focus on
individual contributions to a single global objective, neglecting the nuances
of clustered personalization with multiple cluster-level models and the
non-monetary...
Systematic Review on Learning-based Spectral CT
April 15, 2023
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Physics
Electrical Engineering and Systems Science
Medical Physics
Image and Video Processing
Spectral computed tomography (CT) has recently emerged as an advanced version
of medical CT and significantly improves conventional (single-energy) CT.
Spectral CT has two main forms: dual-energy computed tomography (DECT) and
photon-counti...
Can ChatGPT Forecast Stock Price Movements? Return Predictability and
Large Language Models
April 15, 2023
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Quantitative Finance
Computer Science
Statistical Finance
Computation and Language
We document the capability of large language models (LLMs) like ChatGPT to
predict stock price movements using news headlines, even without direct
financial training. ChatGPT scores significantly predict out-of-sample daily
stock returns, s...
TagCLIP: Improving Discrimination Ability of Open-Vocabulary Semantic
Segmentation
April 15, 2023
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Computer Science
Computer Vision and Pattern Recognition
Contrastive Language-Image Pre-training (CLIP) has recently shown great
promise in pixel-level zero-shot learning tasks. However, existing approaches
utilizing CLIP's text and patch embeddings to generate semantic masks often
misidentify in...
Simple Combinatorial Construction of the ko(1)-Lower Bound for
Approximating the Parameterized k-Clique
April 15, 2023
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Computer Science
Mathematics
Computational Complexity
Discrete Mathematics
Data Structures and Algorithms
Combinatorics
Computational Complexity
Discrete Mathematics
Data Structures and Algorithms
Combinatorics
In the parameterized k-clique problem, or k-Clique for short, we are
given a graph G and a parameter k≥1. The goal is to decide whether there
exist k vertices in G that induce a complete subgraph (i.e., a k-clique).
This pr...
Collective flow of fermionic impurities immersed in a Bose-Einstein
Condensate
April 15, 2023
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Physics
Quantum Gases
Strongly Correlated Electrons
Atomic Physics
Quantum Physics
Interacting mixtures of bosons and fermions are ubiquitous in nature. They
form the backbone of the standard model of physics, provide a framework for
understanding quantum materials and are of technological importance in helium
dilution re...