| The Proper Treatment of Optimality in Computational Phonology Lauri Karttunen (Xerox Research Centre Europe) | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| The qualitative accuracy of the Becker-DeGroot-Marshak method Maximilian Sp\"ath | L4–5 Advanced | CC-BY | mirrored | 11 pp. | arxiv |
| The Quantum Tetrahedron in 3 and 4 Dimensions John C. Baez, John W. Barrett | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| The Question of Relaxation in the Wealth Exchange Models Abhijit KarGupta | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| The Random Oracle Methodology, Revisited Ran Canetti, Oded Goldreich, Shai Halevi | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| There are Asymmetric Minimizers for the One-Dimensional Ginzburg-Landau Model of Superconductivity S. P. Hastings, W. C. Troy | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| The relations among two transversal submanifolds and global manifold Guo-Hong Yang, Guang-Jiong Ni, Yi-Shi Duan(Fudan Univ. Shanghai | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| The relationship between content marketing and the traditional marketing communication tools Szabolcs Nagy, Gergo Hajdu | L4–5 Advanced | CC-BY | mirrored | 10 pp. | arxiv |
| The Religious Aspect of Philosophy | L2–5 Introductory | Public domain | mirrored | 78 pp. | wikisource |
| The Renormalization-Group peculiarities of Griffiths and Pearce: What have we learned? Aernout C.D. van Enter | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| The Republic of Plato Plato, Jowett, Benjamin | L2–5 Introductory | Public domain | mirrored | 368 pp. | gutenberg |
| The right time to sell a stock whose price is driven by Markovian noise Robert C. Dalang, M.-O. Hongler | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Thermal Imaging - Level 1 Jay Seidel | L1–3 Foundational | CC-BY-SA | link only | — | libretexts |
| Thermodynamic limit and proof of condensation for trapped bosons Andras Suto | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| The role of Topology in the classical geometric theories of gravitation Gavriel Segre | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| The Role of Verbs in Document Analysis Judith L. Klavans (Center for Research on Information Access, Columbia University), Min-Yen Kan (Computer Science | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| The SAT Phase Transition Ke Xu, Wei Li | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| The Scholarship of Writing in Nursing Education Lapum et al. | L1–3 Foundational | CC-BY-SA | mirrored | 187 pp. | libretexts |
| The Schubart orbits on the circle Shuqiang Zhu | L4–5 Advanced | CC-BY-NC-ND | mirrored | 23 pp. | arxiv |
| The Self-Organization of Speech Sounds Pierre-Yves Oudeyer | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| The shortest path to complex networks S.N. Dorogovtsev, J.F.F. Mendes | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| The Short-term Impact of Congestion Taxes on Ridesourcing Demand and Traffic Congestion: Evidence from Chicago Yuan Liang, Bingjie Yu, Xiaojian Zhang | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| The Sine-Gordon Wobble German Ka"lbermann | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| The single risk factor approach to capital charges in case of correlated loss given default rates Dirk Tasche | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| The Socialist Movement | L2–5 Introductory | Public domain | mirrored | 256 pp. | wikisource |
| The Spirit of French Music | L2–5 Introductory | Public domain | mirrored | 226 pp. | wikisource |
| The stability of abstract boundary essential singularities Michael J. S. L. Ashley | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| The stability of standard homogeneous Einstein manifolds Emilio A. Lauret, Jorge Lauret | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| The Stock Market as a Game: An Agent Based Approach to Trading in Stocks Eric Engle | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| The Stock Price Relationship between Holding Companies and Subsidiaries: A Case study of Indonesia Multiholding Companies Muhammad Aufaristama | L4–5 Advanced | CC-BY | mirrored | 13 pp. | arxiv |
| The strong effect of network resolution on electricity system models with high shares of wind and solar Martha Maria Frysztacki, Jonas H\"orsch, Veit Hagenmeyer | L4–5 Advanced | CC-BY | mirrored | 23 pp. | arxiv |
| The structural role of weak and strong links in a financial market network Antonios Garas, Panos Argyrakis, Shlomo Havlin | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| The structure of Drinfeld modular forms of level $\Gamma_0(T)$ and applications Tarun Dalal, Narasimha Kumar | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| The Student ensemble of correlation matrices: eigenvalue spectrum and Kullback-Leibler entropy Giulio Biroli, Jean-Philippe Bouchaud, Marc Potters | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| The thermodynamics of portfolios E. W. Piotrowski, J. Sladkowski | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| The Thomas precession and the transformation to rotating frames L. Herrera, A. Di Prisco | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| The threefold way to quantum periods: WKB, TBA equations and q-Painlev\'e Fabrizio Del Monte, Pietro Longhi | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| The Threshold for Random k-SAT is 2^k ln2 - O(k) Dimitris Achlioptas, Yuval Peres | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| The Time Function of Stock Price Shengfeng Mei, Hong Gao | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| The two dimensional Hubbard Model at half-filling: I. Convergent Contributions Vincent Rivasseau (Ecole Polytechnique) | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| The Unbalanced Gromov Wasserstein Distance: Conic Formulation and Relaxation Thibault S\'ejourn\'e, Fran\c{c}ois-Xavier Vialard, Gabriel Peyr\'e | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| The Uncover Process for Random Labeled Trees Benjamin Hackl, Alois Panholzer, Stephan Wagner | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| The Uneven Distribution of Numbers in Nature L. Pietronero, E.Tosatti, V.Tosatti | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| The universal rank-(n-1) bundle on G(1,n) restricted to subvarieties Enrique Arrondo | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| The universal regular quotient of the Chow group of 0-cycles on a singular projective variety H\'el\`ene Esnault, V. Srinivas, Eckart Viehweg | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| The US 2000-2002 Market Descent: How Much Longer and Deeper? D. Sornette (CNRS-Univ. Nice, UCLA), W.-X. Zhou (UCLA) | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| The US 2000-2003 Market Descent: Clarifications D. Sornette (CNRS-Univ. Nice, UCLA), W.-X. Zhou (UCLA) | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| The Use of Instrumentation in Grammar Engineering Norbert Broeker | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| The value of information in financial markets: An agent-based simulation Bence Toth, Enrico Scalas | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| The Varieties of Religious Experience | L2–5 Introductory | Public domain | mirrored | 544 pp. | wikisource |