| Nonparametric Bayesian Double Articulation Analyzer for Direct Language Acquisition from Continuous Speech Signals Tadahiro Taniguchi, Ryo Nakashima, Shogo Nagasaka | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Non-parametric Determination of Real-Time Lag Structure between Two Time Series: the "Optimal Thermal Causal Path" Method D. Sornette (CNRS-Univ. Nice, Ucla), W.-X. Zhou (UCLA | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Nonparametric monitoring of sunspot number observations: a case study Sophie Mathieu, Laure Lef\`evre, Rainer von Sachs | L4–5 Advanced | CC-BY | mirrored | 48 pp. | arxiv |
| Non-parametric Multi-Partitions Clustering Marie du Roy de Chaumaray, Vincent Vandewalle | L4–5 Advanced | CC-BY | mirrored | 11 pp. | arxiv |
| Nonparametric Regression with Shallow Overparameterized Neural Networks Trained by GD with Early Stopping Ilja Kuzborskij, Csaba Szepesv\'ari | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Nonrelativistic and Nonstationary Effective Mass Bound-Spectra Analysis of Squared Class Trigonometric Potentials Through the Point Canonical Formalism Metin Akta\c{s} | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Non-self-adjoint Toeplitz matrices whose principal submatrices have real spectrum Boris Shapiro, Franti\v{s}ek \v{S}tampach | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Non-solvable Lie groups with negative Ricci curvature Emilio A. Lauret, Cynthia E. Will | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Nonstandard spin 2 field theory Antonio Lopez-Pinto | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Non-Stochastic CDF Estimation Using Threshold Queries Princewill Okoroafor, Vaishnavi Gupta, Robert Kleinberg | L4–5 Advanced | CC-BY | mirrored | 28 pp. | arxiv |
| Non-Symplectic Geometry of First Order Time-Dependent Mechanics G.Sardanashvily | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Non-tangential Burns-Krantz rigidity Feng Rong | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Non-trivial, static, geodesically complete space-times with a negative cosmological constant II. $n\ge 5$ M. Anderson, P.T. Chrusciel, E. Delay | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Normalizing Flows for Hierarchical Bayesian Analysis: A Gravitational Wave Population Study David Ruhe, Kaze Wong, Miles Cranmer | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Nostradamus: Weathering Worth Alapan Chaudhuri, Zeeshan Ahmed, Ashwin Rao | L4–5 Advanced | CC-BY | mirrored | 13 pp. | arxiv |
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| Novel Reinforcement Learning Algorithm for Suppressing Synchronization in Closed Loop Deep Brain Stimulators Harsh Agarwal, Heena Rathore | L4–5 Advanced | CC-BY-NC-SA | mirrored | 5 pp. | arxiv |
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| Novelty Detection in Network Traffic: Using Survival Analysis for Feature Identification Taylor Bradley, Elie Alhajjar, Nathaniel Bastian | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Novelty Detection on a Mobile Robot Using Habituation Stephen Marsland, Ulrich Nehmzow, Jonathan Shapiro | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Nowcasting Stock Implied Volatility with Twitter Thomas Dierckx, Jesse Davis, Wim Schoutens | L4–5 Advanced | CC-BY | mirrored | 18 pp. | arxiv |
| Nowcasting with leading indicators applied to COVID-19 fatalities in Sweden Fanny Bergstr\"om, Felix G\"unther, Michael H\"ohle | L4–5 Advanced | CC-BY-NC-SA | mirrored | 19 pp. | arxiv |
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| Null-controllability of underactuated linear parabolic-transport systems with constant coefficients Armand Koenig, Pierre Lissy | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
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| NURS142: Health Assessment in Nursing Bugosh, McAlicher, Zaharchuk | L1–3 Foundational | CC-BY-NC-SA | mirrored | 319 pp. | libretexts |
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| Nurturing Breakthroughs: Lessons from Complexity Theory Didier Sornette (ETH Zurich) | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| NUTF 10: Principles of Nutrition Kaya Teh | L1–3 Foundational | CC-BY-NC-SA-3.0 | mirrored | 576 pp. | libretexts |
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| Nutrition for Nurses | L1–2 Foundational | CC-BY-NC-SA | mirrored | 513 pp. | openstax |
| Nymble: a High-Performance Learning Name-finder Daniel M. Bikel (BBN), Scott Miller (BBN), Richard Schwartz (BBN) | L4–5 Advanced | Licence unknown | link only | — | arxiv |