| A Linkage-based Doubly Imbalanced Graph Learning Framework for Face Clustering Huafeng Yang, Qijie Shen, Xingjian Chen | L4–5 Advanced | CC-BY | mirrored | 11 pp. | arxiv |
| All Are Welcome: An Introduction to the Hospitality Industry Christy Douglass et al. | L1–3 Foundational | CC-BY-NC | mirrored | 286 pp. | libretexts |
| All Pairs Shortest Paths using Bridging Sets and Rectangular Matrix Multiplication Uri Zwick | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| A Logic for SDSI's Linked Local Name Spaces Joseph Y. Halpern, Ron van der Meyden | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| A Look at Financial Dependencies by Means of Econophysics and Financial Economics M. Raddant, T. Di Matteo | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| A lower bound on the quantitative version of the transversality theorem Andrew Murdza, Khai T. Nguyen | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Alternative solutions to diluted p-spin models and XORSAT problems M. Mezard, F. Ricci-Tersenghi, R. Zecchina | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| A Mathematical Framework for Learning Probability Distributions Hongkang Yang | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| A mathematical framework for modelling order book dynamics Rama Cont, Pierre Degond, Lifan Xuan | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| A mathematical overview and some applications of gear design Elisabetta A. Matsumoto, Henry Segerman | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| A Maximum-Entropy Partial Parser for Unrestricted Text Wojciech Skut, Thorsten Brants (Computational Linguistics, Universitity of the Saarland | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| A Mechanism for Pockets of Predictability in Complex Adaptive Systems Jorgen Vitting Andersen, Didier Sornette | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| A Memory-Based Approach to Learning Shallow Natural Language Patterns Shlomo Argamon, Ido Dagan, Yuval Krymolowski | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| America Can't Quit | L2–5 Introductory | Public domain | mirrored | 26 pp. | wikisource |
| American Government | L1–2 Foundational | CC-BY | mirrored | 778 pp. | openstax |
| American Government 2e | L1–2 Foundational | CC-BY | mirrored | 781 pp. | openstax |
| American Government 3e | L1–2 Foundational | CC-BY | mirrored | 726 pp. | openstax |
| American Government 4e | L1–2 Foundational | CC-BY-NC-SA | mirrored | 737 pp. | openstax |
| American Literature I Anne Eidenmuller | L1–3 Foundational | CC-BY-SA | mirrored | 355 pp. | libretexts |
| American Options under Proportional Transaction Costs: Pricing, Hedging and Stopping Algorithms for Long and Short Positions Alet Roux, Tomasz Zastawniak | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| A method for command identification, using modified collision free hashing with addition & rotation iterative hash functions (part 1) Dimitrios Skraparlis | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| A Miniguide to Critical Thinking Joe Y. F. Lau | L1–3 Foundational | CC-BY-NC-SA | link only | — | libretexts |
| A Mixed Course Based Research Approach to Human Physiology Karri Haen Whitmer | L1–3 Foundational | CC-BY-SA | link only | — | libretexts |
| A Model for Counterparty Risk with Geometric Attenuation Effect and the Valuation of CDS Yunfen Bai (1, 2), Xinhua Hu (1) | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| A model for interevent times with long tails and multifractality in human communications: An application to financial trading J. Perello, J. Masoliver, A. Kasprzak | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| A model-free shrinking-dimer saddle dynamics for finding saddle point and solution landscape Lei Zhang, Pingwen Zhang, Xiangcheng Zheng | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| A model of student's dilemma Adam Lipowski, Antonio L. Ferreira | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| A model of the term structure of interest rates based on L\'evy fields Sergio Albeverio, Eugene Lytvynov, Andrea Mahnig | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| A Moment of Perfect Clarity II: Consequences of Sparse Sets Hard for NP with Respect to Weak Reductions Christian Glasser, Lane A. Hemaspaandra | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| A Moment of Perfect Clarity I: The Parallel Census Technique Christian Glasser, Lane A. Hemaspaandra | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| A morphism of intersection homology induced by an algebraic map Andrzej Weber | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| A Multiagent Framework for the Asynchronous and Collaborative Extension of Multitask ML Systems Andrea Gesmundo | L4–5 Advanced | CC-BY | mirrored | 20 pp. | arxiv |
| A multi-time scale non-Gaussian model of stock returns Lisa Borland | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| A multivariate multifractal model for return fluctuations E. Bacry (1) J. Delour (2) J.F. Muzy (2, 3) ((1) CMAP, Ecole Polytechnique Palaiseau France (2) CRPP | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| A musical tour through the land of the past | L2–5 Introductory | Public domain | mirrored | 240 pp. | wikisource |
| An Adaptive Kernel Approach to Federated Learning of Heterogeneous Causal Effects Thanh Vinh Vo, Arnab Bhattacharyya, Young Lee | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| An Adaptive Method for Valuing an Option on Assets with Uncertainty in Volatility Sergei Fedotov, Stephanos Panayides | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| An adaptive splitting method for the Cox-Ingersoll-Ross process C\'onall Kelly, Gabriel J. Lord | L4–5 Advanced | CC-BY | mirrored | 29 pp. | arxiv |
| An Addendum to Krein's Formula Fritz Gesztesy, Konstantin A. Makarov, Eduard Tsekanovskii | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Analogue of Weil representation for abelian schemes Alexander Polishchuk | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Analysing tax evasion dynamics via the Ising model Georg Zaklan, Frank Westerhoff, Dietrich Stauffer | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Analysis in $R^{1,1}$ or the Principal Function Theory Vladimir V. Kisil (Odessa University, Ukraine) | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Analysis of delay correlation matrices K. B. K. Mayya, R. E. Amritkar | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Analytical modelling of terminal properties in industrial growth Arnabi Marjit, Sudipto Marjit, Arnab K. Ray | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Analytic Extension of Keiper-Li Coefficients Krzysztof Ma\'slanka | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Analytic RFR Option Pricing with Smile and Skew Colin Turfus, Aurelio Romero-Berm\'udez | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Analytic Torsion for Quaternionic manifolds and related topics Naichung Conan Leung, Sangkug Yi | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Analyzing Linear DSGE models: the Method of Undetermined Markov States Jordan Roulleau-Pasdeloup | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| An analysis of the two-vortex case in the Chern-Simons Higgs model W. Ding, J. Jost, J. Li | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| An analytical computation of asymptotic Schwarzschild quasinormal frequencies Lubos Motl | L4–5 Advanced | Licence unknown | link only | — | arxiv |