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• W3001738648 abstract "This paper presents an extension of the classical agnostic PAC learning model in which learning problems are modelled not only by a Hypothesis Space $mathcal{H}$, but also by a Learning Space $mathbb{L}(mathcal{H})$, which is a cover of $mathcal{H}$, constrained by a VC-dimension property, that is a suitable domain for Model Selection algorithms. Our main contribution is a data driven general learning algorithm to perform regularized Model Selection on $mathbb{L}(mathcal{H})$. A remarkable, formally proved, consequence of this approach are conditions on $mathbb{L}(mathcal{H})$ and on the loss function that lead to estimated out-of-sample error surfaces which are true U-curves on $mathbb{L}(mathcal{H})$ chains, enabling a more efficient search on $mathbb{L}(mathcal{H})$. To our knowledge, this is the first rigorous result asserting that a non exhaustive search of a family of candidate models can return an optimal solution. In this new framework, an U-curve optimization algorithm becomes a natural component of Model Selection, hence of learning algorithms. The abstract general framework proposed here may have important implications on modern learning models and on areas such as Neural Architecture Search." @default.
• W3001738648 created "2020-01-30" @default.
• W3001738648 creator A5069908689 @default.
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• W3001738648 date "2020-01-26" @default.
• W3001738648 modified "2023-09-27" @default.
• W3001738648 title "Learning the Hypotheses Space from data Part I: Learning Space and U-curve Property." @default.
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