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When reading the Sklearn User Guide, one might see the following statement about Logistic Regression

As an optimization problem, binary class L2 penalized logistic regression minimizes the following cost function:

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Similarly, L1 regularized logistic regression solves the following optimization problem

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I do not understand what the first part (before the + C) on the first equation means. I understand that w is a vector and wt is the transposition (I think). Why is it multiplicated by 1/2 ?

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marked as duplicate by Sycorax, kjetil b halvorsen, mdewey, Community Jan 2 at 21:33

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