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- W4313303735 abstract "We propose an extrinsic Bayesian optimization (eBO) framework for general optimization problems on manifolds. Bayesian optimization algorithms build a surrogate of the objective function by employing Gaussian processes and quantify the uncertainty in that surrogate by deriving an acquisition function. This acquisition function represents the probability of improvement based on the kernel of the Gaussian process, which guides the search in the optimization process. The critical challenge for designing Bayesian optimization algorithms on manifolds lies in the difficulty of constructing valid covariance kernels for Gaussian processes on general manifolds. Our approach is to employ extrinsic Gaussian processes by first embedding the manifold onto some higher dimensional Euclidean space via equivariant embeddings and then constructing a valid covariance kernel on the image manifold after the embedding. This leads to efficient and scalable algorithms for optimization over complex manifolds. Simulation study and real data analysis are carried out to demonstrate the utilities of our eBO framework by applying the eBO to various optimization problems over manifolds such as the sphere, the Grassmannian, and the manifold of positive definite matrices." @default.
- W4313303735 created "2023-01-06" @default.
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- W4313303735 date "2022-12-21" @default.
- W4313303735 modified "2023-09-23" @default.
- W4313303735 title "Extrinsic Bayesian Optimizations on Manifolds" @default.
- W4313303735 doi "https://doi.org/10.48550/arxiv.2212.13886" @default.
- W4313303735 hasPublicationYear "2022" @default.
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