| A theoretical investigation of ferromagnetic tunnel junctions with 4-valued conductances Satoshi Kokado, Kikuo Harigaya | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| A Theoretical Study on Spin-Dependent Transport of "Ferromagnet/Carbon Nanotube Encapsulating Magnetic Atoms/Ferromagnet" Junctions with 4-Valued Conductances Satoshi Kokado, Kikuo Harigaya | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| A Theory for Market Impact: How Order Flow Affects Stock Price Austin Gerig | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| A Theory of Fluctuations in Stock Prices A.L. Alejandro-Quinones, K.E. Bassler, M. Field | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| A Theory of Literate Action - Literate Action II Charles Bazerman | L1–3 Foundational | CC-BY-NC-ND | mirrored | 119 pp. | libretexts |
| A Thousand-Mile Walk To The Gulf | L2–5 Introductory | Public domain | mirrored | 253 pp. | wikisource |
| A threshold model of financial markets Pawe{\l} Sieczka, Janusz A. Ho{\l}yst | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| A time-dependent Markovian model of a limit order book Jonathan A. Ch\'avez-Casillas | L4–5 Advanced | CC-BY | mirrored | 23 pp. | arxiv |
| A time-dependent Poisson-Gamma model for recruitment forecasting in multicenter studies Armando Turchetta, Nicolas Savy, David A. Stephens | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| A Timing-Based Framework for Designing Resilient Cyber-Physical Systems under Safety Constraint Abdullah Al Maruf, Luyao Niu, Andrew Clark | L4–5 Advanced | CC-BY | mirrored | 24 pp. | arxiv |
| ATLAS: A flexible and extensible architecture for linguistic annotation Steven Bird, David Day, John Garofolo | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Atlas of Otolaryngology, Head and Neck Operative Surgery Open Access Atlas of Otolaryngology, Head & Neck Operative Surgery | L1–3 Foundational | Licence unknown | link only | 2,040 pp. | libretexts |
| A Treatise Concerning the Principles of Human Knowledge | L2–5 Introductory | Public domain | mirrored | 142 pp. | wikisource |
| A Treatise on Soap-Making | L2–5 Introductory | Public domain | mirrored | 9 pp. | wikisource |
| Attaching Multiple Prepositional Phrases: Generalized Backed-off Estimation Paola Merlo (U. of Pennsylvania, University of Geneva) Matthew Crocker (University of Edinburgh) Cathy Berthouzoz (University of Geneva) | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Attention-based CNN-LSTM and XGBoost hybrid model for stock prediction Zhuangwei Shi, Yang Hu, Guangliang Mo | L4–5 Advanced | CC-BY | mirrored | 7 pp. | arxiv |
| Attention, Please! Adversarial Defense via Activation Rectification and Preservation Shangxi Wu, Jitao Sang, Kaiyuan Xu | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Attractors of Hamiltonian nonlinear partial differential equations Andrew Comech, Alexander Komech, Elena Kopylova | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| A Tutorial on Parametric Variational Inference Jens Sj\"olund | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| A two-streams discrete ordinates solution of radiative transfer in 1-D spherical geometry Charles H Aboughantous | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Auditing the Imputation Effect on Fairness of Predictive Analytics in Higher Education Hadis Anahideh, Parian Haghighat, Nazanin Nezami | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| A Unified and Modular Model Predictive Control Framework for Soft Continuum Manipulators under Internal and External Constraints Filippo A. Spinelli, Robert K. Katzschmann | L4–5 Advanced | CC-BY | mirrored | 8 pp. | arxiv |
| A Unified Framework for Online Trip Destination Prediction Victor Eberstein, Jonas Sj\"oblom, Nikolce Murgovski | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| A Unified Inference Framework for Multiple Imputation Using Martingales Qian Guan, Shu Yang | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| A Unified Representation Framework for Rideshare Marketplace Equilibrium and Efficiency Alex Chin, Zhiwei Qin | L4–5 Advanced | CC-BY-NC-ND | mirrored | 22 pp. | arxiv |
| A unifying perspective on linear continuum equations prevalent in science. Part II: Canonical forms for time-harmonic equations Graeme W. Milton | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| A Universal Scaling Theory for Complexity of Analog Computation Yaniv S. Avizrats, Joshua Feinberg, Shmuel Fishman | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| A usage based analysis of CoRR Les Carr, Steve Hitchcock, Wendy Hall | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Automatic Adjoint Differentiation for special functions involving expectations Jos\'e Brito, Andrei Goloubentsev, Evgeny Goncharov | L4–5 Advanced | CC-BY | mirrored | 16 pp. | arxiv |
| Automatically Creating Bilingual Lexicons for Machine Translation from Bilingual Text Davide Turcato (Simon Fraser University, TCC Communications, Canada) | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Automatic Belief Revision in SNePS Stuart C. Shapiro, Frances L. Johnson | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Automatic Classification of Text Databases through Query Probing Panagiotis Ipeirotis, Luis Gravano, Mehran Sahami | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Automatic Debugging Support for UML Designs Johann Schumann | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Automatic Extraction of Subcategorization Frames for Czech Anoop Sarkar, Daniel Zeman | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Automatic summarising: factors and directions Karen Sparck Jones (Computer Laboratory, University of Cambridge) | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Automating Coreference: The Role of Annotated Training Data Lynette Hirschman, Patricia Robinson, John Burger | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| AutoML Two-Sample Test Jonas M. K\"ubler, Vincent Stimper, Simon Buchholz | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Avalanche mixing of granular solids in a rotating 2D drum and discrete mapping S. N. Dorogovtsev (Ioffe Physico-Technical Institute, St. Petersburg, Russia) | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Avalanche mixing of granular solids in a rotating 2D drum: diffusion and fractionality S. N. Dorogovtsev (Ioffe Physico-Technical Institute, St. Petersburg, Russia) | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| A Variant of Earley Parsing Mark-Jan Nederhof (University of Groningen), Giorgio Satta (Universita di Padova) | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Avenarius and the Standpoint of Pure Experience | L2–5 Introductory | Public domain | mirrored | 83 pp. | wikisource |
| Average shadowing and gluing property Michael Blank | L4–5 Advanced | CC-BY | mirrored | 17 pp. | arxiv |
| Average shadowing revisited Michael Blank | L4–5 Advanced | CC-BY | mirrored | 19 pp. | arxiv |
| Averaging principle for slow-fast systems of stochastic PDEs with rough coefficients Sandra Cerrai, Yichun Zhu | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| A weighted $L_q(L_p)$-theory for fully degenerate second-order evolution equations with unbounded time-measurable coefficients Ildoo Kim | L4–5 Advanced | CC-BY | mirrored | 23 pp. | arxiv |
| Axial algebras of Monster type $(2\eta, \eta)$ for $D$ diagrams. I Andrey Mamontov, Alexey Staroletov | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Axiomatic characterization of pointwise Shapley decompositions Marcus C Christiansen | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Axiomatic Synthesis of Computer Programs and Computability Theorems Charlie Volkstorf | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Axiomatizing Causal Reasoning Joseph Y. Halpern | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Axi-symmetric solutions for active vector models generalizing 3D Euler and electron--MHD equations Dongho Chae, Kyudong Choi, In-Jee Jeong | L4–5 Advanced | CC-BY | mirrored | 20 pp. | arxiv |