| The virtues and vices of equilibrium and the future of financial economics J. Doyne Farmer, John Geanakoplos | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| The Voronoigram: Minimax Estimation of Bounded Variation Functions From Scattered Data Addison J. Hu, Alden Green, Ryan J. Tibshirani | L4–5 Advanced | CC-BY | mirrored | 75 pp. | arxiv |
| The waiting-time distribution of LIFFE bond futures Marco Raberto, Enrico Scalas, Rudolf Gorenflo | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| The Waldensian Church in the valleys of Piedmont | L2–5 Introductory | Public domain | mirrored | 175 pp. | wikisource |
| The Weierstrass representation of closed surfaces in $R^3$ Iskander A. Taimanov | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| The Will to Believe and Other Essays in Popular Philosophy | L2–5 Introductory | Public domain | mirrored | 346 pp. | wikisource |
| The world according to Renyi: Thermodynamics of multifractal systems Petr Jizba, Toshihico Arimitsu | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| The X-Files: Investigating Alien Performance in a Thin-client World Neil J. Gunther | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Third order correction to localization in a two-level driven system Marco Frasca | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Thomas Reid | L2–5 Introductory | Public domain | mirrored | 160 pp. | wikisource |
| Three Cocycles on $\Diff(S^1)$ Generalizing the Schwarzian Derivative S. Bouarroudj, V. Ovsienko (CMI, Universit\'e de Provence | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Three Dialogues Between Hylas and Philonous | L2–5 Introductory | Public domain | mirrored | 143 pp. | wikisource |
| Threshold Disorder as a Source of Diverse and Complex Behavior in Random Nets Patrick C. McGuire, Henrik Bohr, John W. Clark | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Threshold values, stability analysis and high-q asymptotics for the coloring problem on random graphs Florent Krzakala, Andrea Pagnani, Martin Weigt | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Thus Spake Zarathustra | L2–5 Introductory | Public domain | mirrored | 115 pp. | wikisource |
| Tiling space and slabs with acute tetrahedra David Eppstein, John M. Sullivan, Alper Ungor | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Tilting theory for finite dimensional $1$-Iwanaga-Gorenstein algebras Yuta Kimura, Hiroyuki Minamoto, Kota Yamaura | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Time Consistent Dynamic Limit Order Books Calibrated on Options Jocelyne Bion-Nadal | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Time-Entanglement QKD: Secret Key Rates and Information Reconciliation Coding Joseph J. Boutros, Emina Soljanin | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Time-inhomogeneous diffusion geometry and topology Guillaume Huguet, Alexander Tong, Bastian Rieck | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Time Reversal for Classical Waves in Random Media Guillaume Bal, Leonid Ryzhik | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Time reversal invariance in finance Gilles Zumbach | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Time-scale dependence of correlations among foreign currencies Takayuki Mizuno, Shoko Kurihara, Misako Takayasu | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Timestomping Vulnerability of Age-Sensitive Gossip Networks Priyanka Kaswan, Sennur Ulukus | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Time, Tense and Aspect in Natural Language Database Interfaces I. Androutsopoulos (Microsoft Research Institute, Macquarie University, Sydney) | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Time-Variant System Reliability with Infinite Delay Based on Girsanov's Transformation Hussein K. Asker | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Time-Varying Coefficient DAR Model and Stability Measures for Stablecoin Prices: An Application to Tether Antoine Djobenou, Emre Inan, Joann Jasiak | L4–5 Advanced | CC-BY | mirrored | 53 pp. | arxiv |
| TIP 57: Trauma-Informed Care in Behavioral Health Services Substance Abuse, Mental Health Services Administration | L1–3 Foundational | Public domain | mirrored | 150 pp. | libretexts |
| TLP Library I | L1–3 Foundational | CC-BY-NC-SA-2.0 | link only | — | libretexts |
| TnT - A Statistical Part-of-Speech Tagger Thorsten Brants (Saarland University, Germany) | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Toast-master's companion (1827) | L2–5 Introductory | Public domain | mirrored | 24 pp. | wikisource |
| Tobin tax and market depth G. Ehrenstein, F. Westerhoff, D. Stauffer | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Topical Hidden Genome: Discovering Latent Cancer Mutational Topics using a Bayesian Multilevel Context-learning Approach Saptarshi Chakraborty, Zoe Guan, Colin B. Begg | L4–5 Advanced | CC-BY | mirrored | 36 pp. | arxiv |
| Topic Graph Generation for Query Navigation: Use of Frequency Classes for Topic Extraction Yoshiki Niwa, Shingo Nishioka, Makoto Iwayama | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Topological correlations in trivial knots: new arguments in support of the crumpled polymer globule Sergei Nechaev, Oleg Vasilyev | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Topological Defects and Morphology of Graphitic Carbon Materials: An Approach Based on Differential Geometry Masahiko Hayashi | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Topological Dynamics of Enveloping Semigroups Anima Nagar, Manpreet Singh | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Topological entropy for countable Markov shifts and Exel--Laca algebras Yuta Michimoto, Yushi Nakano, Hisayoshi Toyokawa | L4–5 Advanced | CC-BY | mirrored | 47 pp. | arxiv |
| Topological fluid mechanics of point vortex motions Philip Boyland, Mark Stremler, Hassan Aref | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Topological identification in networks of dynamical systems Donatello W. Materassi, Giacomo W. Innocenti | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Topological obstructions to the diagonalisation of pseudodifferential systems Matteo Capoferri, Grigori Rozenblum, Nikolai Saveliev | L4–5 Advanced | CC-BY | mirrored | 17 pp. | arxiv |
| Topological Properties of Stock Networks Based on Random Matrix Theory in Financial Time Series Cheoljun Eom, Gapjin Oh, Hawoong Jeong | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Topological rigidity of Hamiltonian loops and quantum homology Fran\c{c}ois Lalonde, Dusa McDuff, Leonid Polterovich | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Topological Triviality of $\mu$-constant Deformations of Type f(x) + tg(x) Adam Parusinski | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Topology of solutions of the Liouville equation Wlodzimierz Piechocki | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Topology of the set of smooth solutions to the Liouville equation Kazimierz Bragiel, Wlodzimierz Piechocki | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| To Preference via Entrenchment Konstantinos Georgatos | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| To reorient is easier than to orient: an on-line algorithm for reorientation of graphs Marta Fiori-Carones, Alberto Marcone | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Toric Degenerations of Fano Varieties and Constructing Mirror Manifolds Victor V. Batyrev | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Toric varieties and minimal complexes Paul Bressler, Valery Lunts | L4–5 Advanced | Licence unknown | link only | — | arxiv |