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- W2159788726 abstract "Kernel learning plays an important role in many machine learning tasks. However, algorithms for learning a kernel matrix often scale poorly, with running times that are cubic in the number of data points. In this paper, we propose efficient algorithms for learning low-rank kernel matrices; our algorithms scale linearly in the number of data points and quadratically in the rank of the kernel. We introduce and employ Bregman matrix divergences for rank-deficient matrices---these divergences are natural for our problem since they preserve the rank as well as positive semi-definiteness of the kernel matrix. Special cases of our framework yield faster algorithms for various existing kernel learning problems. Experimental results demonstrate the effectiveness of our algorithms in learning both low-rank and full-rank kernels." @default.
- W2159788726 created "2016-06-24" @default.
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- W2159788726 date "2006-01-01" @default.
- W2159788726 modified "2023-10-16" @default.
- W2159788726 title "Learning low-rank kernel matrices" @default.
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- W2159788726 doi "https://doi.org/10.1145/1143844.1143908" @default.
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