Publications | Yiwen Chenhttps://www.yiwenchen.me/publications/PublicationsWowchemy (https://wowchemy.com)en-us© 2026 Yiwen Chen.https://www.yiwenchen.me/media/icon_hu58df4030709b3525813cf337190f60c3_19503_512x512_fill_lanczos_center_3.pngPublicationshttps://www.yiwenchen.me/publications/Random-subspace ellipsoidal trust-region methods for derivative-free optimizationhttps://www.yiwenchen.me/publications/random-subspace-ellipsoidal-trust-region-methods-for-derivative-free-optimization/Mon, 19 Oct 2026 15:00:00 +0000https://www.yiwenchen.me/publications/random-subspace-ellipsoidal-trust-region-methods-for-derivative-free-optimization/Accuracy and Relationships of Quadratic Models in Derivative-free Optimizationhttps://www.yiwenchen.me/publications/accuracy-and-relationships-of-quadratic-models-in-derivative-free-optimization/Tue, 12 May 2026 15:00:00 +0000https://www.yiwenchen.me/publications/accuracy-and-relationships-of-quadratic-models-in-derivative-free-optimization/Determining inscribability of polytopes via rank minimization based on slack matriceshttps://www.yiwenchen.me/publications/determining-inscribability-of-polytopes-via-rank-minimization-based-on-slack-matrices/Tue, 12 May 2026 11:03:00 +0000https://www.yiwenchen.me/publications/determining-inscribability-of-polytopes-via-rank-minimization-based-on-slack-matrices/Relationships between full-space and subspace quadratic interpolation models and simplex derivativeshttps://www.yiwenchen.me/publications/relationships-between-full-space-and-subspace-quadratic-interpolation-models-and-simplex-derivatives/Tue, 10 Feb 2026 15:00:00 +0000https://www.yiwenchen.me/publications/relationships-between-full-space-and-subspace-quadratic-interpolation-models-and-simplex-derivatives/CLARSTA: A random subspace trust-region algorithm for convex-constrained derivative-free optimizationhttps://www.yiwenchen.me/publications/clarsta-a-random-subspace-trust-region-algorithm-for-convex-constrained-derivative-free-optimization/Wed, 25 Jun 2025 11:03:00 +0000https://www.yiwenchen.me/publications/clarsta-a-random-subspace-trust-region-algorithm-for-convex-constrained-derivative-free-optimization/A general framework for floating point error analysis of first-order simplex derivativeshttps://www.yiwenchen.me/publications/a-general-framework-for-floating-point-error-analysis-of-simplex-derivatives/Wed, 01 Jan 2025 08:00:00 +0000https://www.yiwenchen.me/publications/a-general-framework-for-floating-point-error-analysis-of-simplex-derivatives/$Q$-fully quadratic modeling and its application in a random subspace derivative-free methodhttps://www.yiwenchen.me/publications/q-fully-quadratic-modeling-and-its-application-in-a-random-subspace-derivative-free-method/Thu, 20 Jun 2024 11:02:00 +0000https://www.yiwenchen.me/publications/q-fully-quadratic-modeling-and-its-application-in-a-random-subspace-derivative-free-method/Adapting the centred simplex gradient to compensate for misaligned sample pointshttps://www.yiwenchen.me/publications/adapting-the-centred-simplex-gradient-to-compensate-for-misaligned-sample-points/Tue, 18 Jul 2023 11:02:00 +0000https://www.yiwenchen.me/publications/adapting-the-centred-simplex-gradient-to-compensate-for-misaligned-sample-points/Error Analysis of Surrogate Models Constructed through Operations on Sub-modelshttps://www.yiwenchen.me/publications/error-analysis-of-surrogate-models-constructed-through-operations-on-sub-models/Fri, 30 Dec 2022 11:02:00 +0000https://www.yiwenchen.me/publications/error-analysis-of-surrogate-models-constructed-through-operations-on-sub-models/