| Market completion using options Mark Davis, Jan Obloj | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Market dynamics after large financial crash G.L. Buchbinder, K.M. Chistilin | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Market Ecology, Pareto Wealth Distribution and Leptokurtic Returns in Microscopic Simulation of the LLS Stock Market Model Sorin Solomon, Moshe Levy | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Market Fluctuations: multiplicative and percolation models, size effects and predictions D. Sornette (CNRS, Univ. Nice, UCLA) | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Market Segmentation Trees Ali Aouad, Adam N. Elmachtoub, Kris J. Ferreira | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Market Simulation Displaying Multifractality Kazuko Yamasaki, Kenneth J. Mackin | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Markov Decision Processes under Model Uncertainty Ariel Neufeld, Julian Sester, Mario \v{S}iki\'c | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Martingale selection problem and asset pricing in finite discrete time Dmitry B. Rokhlin | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Martingales, the Efficient Market Hypothesis, and Spurious Stylized Facts Joseph L. McCauley, Kevin E. Bassler, Gemunu H. Gunaratne | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Matchertext: Towards Verbatim Interlanguage Embedding Bryan Ford | L4–5 Advanced | CC-BY | mirrored | 23 pp. | arxiv |
| Matching calipers and the precision of index estimation Ben B. Hansen | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Matching of Everyday Power Supply and Demand with Dynamic Pricing: Problem Formalisation and Conceptual Analysis Thibaut Th\'eate, Antonio Sutera, Damien Ernst | L4–5 Advanced | CC-BY | mirrored | 11 pp. | arxiv |
| Materialized View Selection and Maintenance Using Multi-Query Optimization Hoshi Mistry, Prasan Roy, Krithi Ramamritham | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Maternal-Newborn Nursing | L1–2 Foundational | CC-BY-NC-SA | mirrored | 1,241 pp. | openstax |
| Mathematical aspects and simulation of electron-electron scattering in graphene Giovanni Nastasi, Vittorio Romano | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Mathematical Background of Formalism of Operator Manifold G.T.Ter-Kazarian | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Mathematical Instantons In Characteristic Two A. P. Rao | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Mathematical Software: Past, Present, and Future Ronald F. Boisvert | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Mathematics for Wastewater Management Kelly Brooks | L1–3 Foundational | CC-BY | mirrored | 59 pp. | libretexts |
| Matrix compatibility and correlation mixture representation of generalized Gini's gamma Takaaki Koike, Marius Hofert | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Matrix-valued Cauchy bi-orthogonal polynomials and a novel noncommutative integrable lattice Shi-Hao Li, Ying Shi, Guo-Fu Yu | L4–5 Advanced | CC-BY | mirrored | 18 pp. | arxiv |
| Matter and Memory | L2–5 Introductory | Public domain | mirrored | 354 pp. | wikisource |
| Matter seen at many scales and the geometry of averaging in relativistic cosmology Thomas Buchert, Mauro Carfora | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Maturity-independent risk measures Thaleia Zariphopoulou, Gordan Zitkovic | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Maxima of the $Q$-index of non-bipartite graphs: forbidden short odd cycles Lu Miao, Ruifang Liu, Jie Xue | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Maximin setting for investment problems and fixed income management with observable but non-predictable parameters Nikolai Dokuchaev | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Maximizing the Growth Rate under Risk Constraints Traian A. Pirvu, Gordan Zitkovic | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Maximizing Use-Case Specificity through Precision Model Tuning Pranjali Awasthi, David Recio-Mitter, Yosuke Kyle Sugi | L4–5 Advanced | CC-BY | mirrored | 9 pp. | arxiv |
| Maximum Likelihood Estimation for Maximal Distribution under Sublinear Expectation Xinpeng Li, Yue Liu, Jiaquan Lu | L4–5 Advanced | CC-BY | mirrored | 11 pp. | arxiv |
| Mean field game of mutual holding with defaultable agents, and systemic risk Mao Fabrice Djete, Gaoyue Guo, Nizar Touzi | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Mean Field Game of Optimal Relative Investment with Jump Risk Lijun Bo, Shihua Wang, Xiang Yu | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Measurement of the Interactions and Stability of MTDC Systems Wanning Zheng, Li Chai | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Measures of Distributional Similarity Lillian Lee | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Measuring Anti-Correlations in the Nordic Electricity Spot Market by Wavelets Ingve Simonsen | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Measuring Corporate Digital Divide with web scraping: Evidence from Italy Mazzoni Leonardo, Pinelli Fabio, Riccaboni Massimo | L4–5 Advanced | CC-BY | mirrored | 27 pp. | arxiv |
| Measuring distribution risk in discrete models Roberto Fontana, Patrizia Semeraro | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Measuring efficiency in high-accuracy, broad-coverage statistical parsing Brian Roark, Eugene Charniak | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Measuring long-range dependence in electricity prices Rafal Weron | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Measuring non-exchangeable tail dependence using tail copulas Takaaki Koike, Shogo Kato, Marius Hofert | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Measuring Regulatory Barriers Using Annual Reports of Firms Haosen Ge | L4–5 Advanced | CC-BY | mirrored | 29 pp. | arxiv |
| Measuring tail risk at high-frequency: An $L_1$-regularized extreme value regression approach with unit-root predictors Julien Hambuckers, Li Sun, Luca Trapin | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Measuring the "non-stopping timeness" of ends of previsible sets Ju-Yi Yen, Marc Yor | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Measuring Volatility Clustering in Stock Markets Gabjin Oh, Seunghwan Kim, Cheoljun Eom | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Meat Cutting and Processing for Food Service BC Cook Articulation Committee | L1–3 Foundational | CC-BY | mirrored | 76 pp. | libretexts |
| Meat Identification and Fabrication Marshall Welsh & William R. Thibodeaux | L1–3 Foundational | CC-BY-NC-SA | mirrored | 220 pp. | libretexts |
| Medical Assistant - Introduction to Clinical Skills Karrie Stanfill | L1–3 Foundational | CC-BY | link only | — | libretexts |
| Medical-Surgical Nursing | L1–2 Foundational | CC-BY-NC-SA | mirrored | 1,557 pp. | openstax |
| Medical Terminology Stacey Grimm, Coleen Allee, Elaine Strachota | L1–3 Foundational | CC-BY | mirrored | 95 pp. | libretexts |
| Medical Terminology 2e OpenRN | L1–3 Foundational | CC-BY | mirrored | 473 pp. | libretexts |
| Medical Terminology for Healthcare Professions Andrea Nelson, Katherine Greene | L1–3 Foundational | CC-BY | mirrored | 298 pp. | libretexts |