| Centroid-based summarization of multiple documents: sentence extraction, utility-based evaluation, and user studies Dragomir R. Radev (University of Michigan), Hongyan Jing (Columbia University), Malgorzata Budzikowska (IBM TJ Watson Research Center) | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Certifying Safety in Reinforcement Learning under Adversarial Perturbation Attacks Junlin Wu, Hussein Sibai, Yevgeniy Vorobeychik | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| CGIBNet: Bandwidth-constrained Communication with Graph Information Bottleneck in Multi-Agent Reinforcement Learning Qi Tian, Kun Kuang, Baoxiang Wang | L4–5 Advanced | CC-BY | mirrored | 12 pp. | arxiv |
| CGX: Adaptive System Support for Communication-Efficient Deep Learning Ilia Markov, Hamidreza Ramezanikebrya, Dan Alistarh | L4–5 Advanced | CC-BY | mirrored | 14 pp. | arxiv |
| Chain enumeration, partition lattices and polynomials with only real roots Christos A. Athanasiadis, Katerina Kalampogia-Evangelinou | L4–5 Advanced | CC-BY | mirrored | 19 pp. | arxiv |
| Change point estimation for the telegraph process observed at discrete times Alessandro De Gregorio, Stefano M. Iacus | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Changes in the Distribution of Income Volatility Shane T. Jensen, Stephen H. Shore | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Chaos and Annealing in Social networks Fariel Shafee | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Chaos and rectification of electromagnetic wave in a lateral semiconductor superlattice Kirill N. Alekseev, Pekka Pietilainen, Alexander A. Zharov | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| "Chaotic" kinetics, macroscopic fluctuations and long-term stability of the catalytic systems Maria K. Koleva, L. A. Petrov | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Chaotic time series in financial processes consisting of savings with piecewise constant monthly contributions Jos\'e Pedro Gaiv\~ao, Benito Pires | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Characteristic Curves and the exponentiation in the Riordan Lie group: A connection through examples Pedro J. Chocano, Ana Luz\'on, Manuel Alonso Mor\'on | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Characteristicks of Men, Manners, Opinions, Times | L2–5 Introductory | Public domain | mirrored | 109 pp. | wikisource |
| Characterization of the Global Bias Problem in Aerial Federated Learning Ruslan Zhagypar, Nour Kouzayha, Hesham ElSawy | L4–5 Advanced | CC-BY | mirrored | 7 pp. | arxiv |
| Characterizing Financial Market Coverage using Artificial Intelligence Jean Marie Tshimula, D'Jeff K. Nkashama, Patrick Owusu | L4–5 Advanced | CC-BY | mirrored | 12 pp. | arxiv |
| Characterizing Spectral Properties of Bridge Yixin Li | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Charmed roots and the Kroweras complement Benjamin Dequ\^ene, Gabriel Frieden, Alessandro Iraci | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| CHE 125: GOB Introductory Chemistry Erin O’Connell | L1–3 Foundational | CC-BY-SA | mirrored | 475 pp. | libretexts |
| Chebyshev-Cantelli PAC-Bayes-Bennett Inequality for the Weighted Majority Vote Yi-Shan Wu, Andr\'es R. Masegosa, Stephan S. Lorenzen | L4–5 Advanced | CC-BY | mirrored | 23 pp. | arxiv |
| Chebyshev's Sum Inequality and the Zagreb Indices Inequality Hanjo T\"aubig | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Cheeger-Gromov Theory and Applications to General Relativity Michael T. Anderson | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Chem 410: Chemistry for Health Sciences | L1–3 Foundational | Licence unknown | link only | — | libretexts |
| Chemistry | L1–2 Foundational | CC-BY | mirrored | 1,355 pp. | openstax |
| Chemistry 2e | L1–2 Foundational | CC-BY-NC-SA | mirrored | 1,203 pp. | openstax |
| Chemistry: Atoms First | L1–2 Foundational | CC-BY | mirrored | 1,355 pp. | openstax |
| Chemistry: Atoms First 2e | L1–2 Foundational | CC-BY-NC-SA | mirrored | 1,201 pp. | openstax |
| Chern Classes of Bundles over Rational Surfaces Elizabeth Gasparim | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| CHERRY: a Computational metHod for accuratE pRediction of virus-pRokarYotic interactions using a graph encoder-decoder model Jiayu Shang, Yanni Sun | L4–5 Advanced | CC-BY-NC-ND | mirrored | 20 pp. | arxiv |
| Children's Literature: A Tradition | L1–3 Foundational | CC-BY-NC | link only | — | libretexts |
| Children's Literature: Foundations, History, and Practice Caroline Hopper | L1–3 Foundational | CC-BY-NC-SA | link only | — | libretexts |
| Children's Programs Administration Jennifer Marta & Hannah Knott | L1–3 Foundational | CC-BY-NC | link only | — | libretexts |
| Chip-level CMP Modeling and Smart Dummy for HDP and Conformal CVD Films George Yong Liu (1), Ray F. Zhang (1), Kelvin Hsu (1) | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Chunk Tagger - Statistical Recognition of Noun Phrases Wojciech Skut, Thorsten Brants (Computational Linguistics, Universitity of the Saarland | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Circadian patterns of Wikipedia editorial activity: A demographic analysis Taha Yasseri, R\'obert Sumi, J\'anos Kert\'esz | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Clarinet: A Music Retrieval System Kshitij Alwadhi, Rohan Sharma, Siddhant Sharma | L4–5 Advanced | CC-BY | mirrored | 18 pp. | arxiv |
| Classical ground states of symmetrical Heisenberg spin systems Heinz-Juergen Schmidt, Marshall Luban | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Classical lifting processes and multiplicative vector fields Kirill Mackenzie, Ping Xu | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Classification and calibration of affine models driven by independent L\'evy processes Micha{\l} Barski, Rafa{\l} {\L}ochowski | L4–5 Advanced | CC-BY | mirrored | 35 pp. | arxiv |
| Classification of Exceptional Complements: Elliptic Curve Case Terutake Abe (Johns Hopkins University) | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Classification of Lagrangian fibrations Ivan Kozlov | L4–5 Advanced | CC-BY | mirrored | 41 pp. | arxiv |
| Classification of Random Boolean Networks Carlos Gershenson | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Classification of stationary compact homogeneous special pseudo K\"ahler manifolds of semisimple groups D.V. Alekseevsky, V. Cortes | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Cleaning the covariance matrix of strongly nonstationary systems with time-independent eigenvalues Christian Bongiorno, Damien Challet, Gr\'egoire Loeper | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Cliff Castles and Cave Dwellings of Europe | L2–5 Introductory | Public domain | mirrored | 320 pp. | wikisource |
| Clifford Residues and Charge Quantization Marcus S. Cohen | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Climate change heterogeneity: A new quantitative approach Maria Dolores Gadea, Jesus Gonzalo | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Clinical Chemistry -Theory, Analysis, Correlation Lawrence Kaplan & Amadeo Pesce | L1–3 Foundational | CC-BY-NC-SA | link only | — | libretexts |
| Clinical Nursing Skills | L1–2 Foundational | CC-BY-NC-SA | mirrored | 1,347 pp. | openstax |
| Clinical Procedures for Safer Patient Care Doyle, McCutcheon | L1–3 Foundational | CC-BY | link only | — | libretexts |
| Clinical Veterinary Diagnostic Laboratory Erin Burton, Anna Lalande | L1–3 Foundational | CC-BY-NC | mirrored | 160 pp. | libretexts |