Publications

Yiwen Chen, Pengcheng Xie (2026). Random-subspace ellipsoidal trust-region methods for derivative-free optimization. preprint.

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Yiwen Chen (2026). Relationships between full-space and subspace quadratic interpolation models and simplex derivatives. preprint.

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Yiwen Chen, Warren Hare, Amy Wiebe (2025). CLARSTA: A random subspace trust-region algorithm for convex-constrained derivative-free optimization. preprint.

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Yiwen Chen, Warren Hare, Lindon Roberts (2026). Accuracy and Relationships of Quadratic Models in Derivative-free Optimization. SIAM Journal on Optimization.

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Yiwen Chen, João Gouveia, Warren Hare, Amy Wiebe (2026). Determining inscribability of polytopes via rank minimization based on slack matrices. SIAM Journal on Discrete Mathematics.

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Yiwen Chen, Warren Hare, Amy Wiebe (2025). A general framework for floating point error analysis of first-order simplex derivatives. Optimization Methods and Software.

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Yiwen Chen, Warren Hare, Amy Wiebe (2024). $Q$-fully quadratic modeling and its application in a random subspace derivative-free method. Computational Optimization and Applications.

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Yiwen Chen, Warren Hare (2023). Adapting the centred simplex gradient to compensate for misaligned sample points. IMA Journal of Numerical Analysis.

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Yiwen Chen, Warren Hare, Gabriel Jarry-Bolduc (2022). Error Analysis of Surrogate Models Constructed through Operations on Sub-models. Mathematics of Operations Research.

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