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A mathematical expression w/ >1 term containing the same variable (eg, x & x^2). Polynomials are commonly used to model curvilinear relationships.

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Degree Parameter for SVM Polynomial Kernel

It appears that the degree parameter controls the flexibility of the decision boundary. Higher degree kernels yield a more flexible decision boundary. Ben-Hur, Asa, and Jason Weston. "A user’s guide …
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Degree Parameter for SVM Polynomial Kernel

For Support Vector Machines, what effect does the degree parameter have on a model, when using a polynomial kernel? … I was able to find an intuitive explanation of the influence of cost and gamma model parameters, but not the effect of the degree parameter when using a polynomial kernel. …
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