| Sector identification in a set of stock return time series traded at the London Stock Exchange C. Coronnello, M. Tumminello, F. Lillo | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Secure Determinant Codes for Distributed Storage Systems Adel Elmahdy, Michelle Kleckler, Soheil Mohajer | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Secure Distributed Training at Scale Eduard Gorbunov, Alexander Borzunov, Michael Diskin | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Security of the Cao-Li Public Key Cryptosystem Lek-Heng Lim | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Security Policy Consistency Carlos Ribeiro, Andre Zuquete, Paulo Ferreira | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Security, Privacy and Challenges in Microservices Architecture and Cloud Computing- Survey Hemanth Gopal, Guanqun Song, Ting Zhu | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Segal's contractions, AdS and conformal groups Daniel Sternheimer | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Segregation with Social Linkages: Evaluating Schelling's Model with Networked Individuals Roy Cerqueti, Luca De Benedictis, Valerio Leone Sciabolazza | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Segregatory Coordination and Ellipsis in Text Generation James Shaw (Columbia University) | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Selectional Restrictions in HPSG Ion Androutsopoulos, Robert Dale | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Selections from the writings of Kierkegaard | L2–5 Introductory | Public domain | mirrored | 85 pp. | wikisource |
| Select miscellany | L2–5 Introductory | Public domain | mirrored | 23 pp. | wikisource |
| Self-Attentive Pooling for Efficient Deep Learning Fang Chen, Gourav Datta, Souvik Kundu | L4–5 Advanced | CC-BY | mirrored | 10 pp. | arxiv |
| Self Determination Program Foundations Kelly Kulzer | L1–3 Foundational | CC-BY-NC-SA | mirrored | 33 pp. | libretexts |
| Self-Ensembling GAN for Cross-Domain Semantic Segmentation Yonghao Xu, Fengxiang He, Bo Du | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Self-Evolving Integrated Vertical Heterogeneous Networks Amin Farajzadeh, Mohammad G. Khoshkholgh, Halim Yanikomeroglu | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Self-Optimizing and Pareto-Optimal Policies in General Environments based on Bayes-Mixtures Marcus Hutter | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Self-Similar Decay in the Kraichnan Model of a Passive Scalar G. Eyink (U. Arizona), J. Xin (U. Texas Austin) | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Self-Supervised Tracking via Target-Aware Data Synthesis Xin Li, Wenjie Pei, Yaowei Wang | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Semantic Communications with Discrete-time Analog Transmission: A PAPR Perspective Yulin Shao, Deniz Gunduz | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Semantic Data Sourcing for 6G Edge Intelligence Kaibin Huang, Qiao Lan, Zhiyan Liu | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Semantic Parsing based on Verbal Subcategorization Jordi Atserias, Irene Castellon, Montse Civit | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Semidefinite programming on population clustering: a global analysis Shuheng Zhou | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Semi-metric portfolio optimization: a new algorithm reducing simultaneous asset shocks Nick James, Max Menzies, Jennifer Chan | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Semiorthogonal decomposition via categorical action You-Hung Hsu | L4–5 Advanced | CC-BY | mirrored | 30 pp. | arxiv |
| Semi-random process without replacement Shoni Gilboa, Dan Hefetz | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Semistable reduction in characteristic 0 for families of surfaces and three-folds Kalle Karu | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Senior Internship: Advanced leadership Development William R. Thibodeaux, Jean-Pierre Daigle | L1–3 Foundational | CC-BY-NC-SA | mirrored | 144 pp. | libretexts |
| Sensitivities of Asian options in the Black-Scholes model Dan Pirjol, Lingjiong Zhu | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Sensitivity analysis for transportability in multi-study, multi-outcome settings Ngoc Q. Duong, Amy J. Pitts, Soohyun Kim | L4–5 Advanced | CC-BY | mirrored | 35 pp. | arxiv |
| Sensitivity Estimation for Dark Matter Subhalos in Synthetic Gaia DR2 using Deep Learning Abdullah Bazarov, Mar\'ia Benito, Gert H\"utsi | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Sensitivity Measures Based on Scoring Functions Tobias Fissler, Silvana M. Pesenti | L4–5 Advanced | CC-BY | mirrored | 38 pp. | arxiv |
| Sensor data-driven analysis for identification of causal relationships between exposure to air pollution and respiratory rate in asthmatics D K Arvind, S Maiya | L4–5 Advanced | CC-BY | mirrored | 14 pp. | arxiv |
| Separating Surface Order and Syntactic Relations in a Dependency Grammar Norbert Broeker (IMS, Stuttgart University) | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Separating the complexity classes NL and NP David B. Benson | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Sequential Graph Attention Learning for Predicting Dynamic Stock Trends (Student Abstract) Tzu-Ya Lai, Wen Jung Cheng, Jun-En Ding | L4–5 Advanced | CC-BY | mirrored | 2 pp. | arxiv |
| Sequential Spatially Balanced Sampling Rapha\"el Jauslin, Bardia Panahbehagh, Yves Till\'e | L4–5 Advanced | CC-BY | mirrored | 31 pp. | arxiv |
| Serial correlation and heterogeneous volatility in financial markets: beyond the LeBaron effect Simone Bianco, Fulvio Corsi, Roberto Reno' | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Set-Asides in USDA Food Procurement Auctions Ni Yan, WenTing Tao | L4–5 Advanced | CC-BY | mirrored | 22 pp. | arxiv |
| Seven clusters in genomic triplet distributions A. N. Gorban, A. Yu. Zinovyev, T. G. Popova | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Seventeen lectures on the study of medieval and modern history and kindred subjects | L2–5 Introductory | Public domain | mirrored | 402 pp. | wikisource |
| Shakespeare and Music | L2–5 Introductory | Public domain | mirrored | 191 pp. | wikisource |
| Shapley Effect Estimation using Polynomial Chaos Adrian Stein, Tarunraj Singh | L4–5 Advanced | CC-BY-NC-ND | mirrored | 29 pp. | arxiv |
| Shared Cache Coded Caching Schemes Using Designs and Circuits of Matrices Niladri Das, B. Sundar Rajan | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Sharp $L^p$ estimates and size of nodal sets for generalized Steklov eigenfunctions Xiaoqi Huang, Yannick Sire, Xing Wang | L4–5 Advanced | CC-BY | mirrored | 23 pp. | arxiv |
| Sharp Bounds on Eigenvalues via Spectral Embedding Based on Signless Laplacians Zhi-Feng Wei | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Sharper Analysis for Minibatch Stochastic Proximal Point Methods: Stability, Smoothness, and Deviation Xiao-Tong Yuan, Ping Li | L4–5 Advanced | CC-BY | mirrored | 55 pp. | arxiv |
| Sharp norm estimates for the classical heat equation Erik Talvila | L4–5 Advanced | CC-BY-NC-ND | mirrored | 3 pp. | arxiv |
| Sheaf-theoretic self-filtering network of low-cost sensors for local air quality monitoring: A causal approach Anh-Duy Pham, Chuong Dinh Le, Hoang Viet Pham | L4–5 Advanced | CC-BY | mirrored | 26 pp. | arxiv |
| Sheet metal drafting | L2–5 Introductory | Public domain | mirrored | 5 pp. | wikisource |