| 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 autocorrelation times in Neural Markov Chain Monte Carlo simulations Piotr Bia{\l}as, Piotr Korcyl, Tomasz Stebel | L4–5 Advanced | CC-BY | mirrored | 20 pp. | arxiv |
| Analysis of delay correlation matrices K. B. K. Mayya, R. E. Amritkar | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Analysis of LGM Model for sEMG Signals related to Weight Training Durgesh Kusuru, Anish C. Turlapaty, Mainak Thakur | L4–5 Advanced | arxiv-nonexclusive | 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 |
| An Analytical Framework for Control Synthesis of Cyber-Physical Systems with Safety Guarantee Luyao Niu, Abdullah Al Maruf, Andrew Clark | L4–5 Advanced | CC-BY | mirrored | 8 pp. | arxiv |
| An Approach to the Implementation of Overlapping Rules in Standard ML Riccardo Pucella | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| An approximation to peak detection power using Gaussian random field theory Yu Zhao, Dan Cheng, Armin Schwartzman | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Anatomical Illustrations (Most, Tran, Seweryn, and Graham) Corrina Most, Katherine Tran, Olivia Seweryn | L1–3 Foundational | CC-BY-NC-SA-3.0 | link only | — | libretexts |
| Anatomy and Physiology OpenStax | L1–3 Foundational | CC-BY | link only | — | libretexts |
| Anatomy and Physiology | L1–2 Foundational | CC-BY | mirrored | 1,420 pp. | openstax |
| Anatomy and Physiology 2e | L1–2 Foundational | CC-BY-NC-SA | mirrored | 1,347 pp. | openstax |
| Anatomy and Physiology (Boundless) | L1–3 Foundational | CC-BY-SA | link only | — | libretexts |
| Anatomy and Physiology II Laboratory Manual Sheryl Shook | L1–3 Foundational | CC-BY | link only | — | libretexts |
| Anatomy and Physiology of Animals Ruth Lawson | L1–3 Foundational | CC-BY-SA-3.0 | mirrored | 407 pp. | libretexts |
| An Average Analysis of Backtracking on Random Constraint Satisfaction Problems Ke Xu, Wei Li | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Anchoring a Lexicalized Tree-Adjoining Grammar for Discourse Bonnie Lynn Webber, Aravind K. Joshi (University of Pennsylvania) | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Ancient and Modern History of the Russian Empire | L2–5 Introductory | Public domain | mirrored | 24 pp. | wikisource |
| An Economic Model of Coupled Exponential Maps R. Lopez-Ruiz, J. Gonzalez-Estevez, M.G. Cosenza | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| An Efficient Algorithm for Optimal Routing Through Constant Function Market Makers Theo Diamandis, Max Resnick, Tarun Chitra | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| An Efficient Approach for Statistical Matching of Survey Data Trough Calibration, Optimal Transport and Balanced Sampling Rapha\"el Jauslin, Yves Till\'e | L4–5 Advanced | CC-BY | mirrored | 17 pp. | arxiv |
| An efficient optimization based microstructure reconstruction approach with multiple loss functions Anindya Bhaduri, Ashwini Gupta, Audrey Olivier | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| An EKG Interpretation Primer Jacqueline Christianson et al. | L1–3 Foundational | CC-BY-NC-SA | mirrored | 49 pp. | libretexts |
| An electronic warfare approach for deploying a software-based Wi-Fi jammer Keshav Kaushik, Rahul Negi, Prabhav Dev | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| An Ellsberg paradox for ambiguity aversion Christoph Kuzmics, Brian W. Rogers, Xiannong Zhang | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |