Unverified50% confidenceFactExact time
In scikit-learn, Average Precision (AP) is a common way to summarize the PR curve, but it is not equivalent to directly computing the trapezoidal area under the PR curve (AUC-PR).
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10/19/2026
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UnverifiedAP is calculated as Σ (R_n - R_{n-1}) * P_n, where P_n and R_n are the precision and recall at the nth threshold respectively, whereas the trapezoidal area under the PR curve uses linear interpolation, and the two differ when the curve is non-monotonic.69% similarUnverifiedThe Crouzeix conjecture states: for any complex matrix A and any complex analytic function f on its numerical range, ‖f(A)‖ ≤ 2·sup{|f(z)| : z ∈ W(A)}, with the conjecture that the constant 2 is sharp.55% similarUnverified对偶变换将平面上的一个点(a,b)映射为一条直线y=ax-b，是计算几何中的基本技术54% similarUnverifiedThe Poisson equation takes the form (I - P)g = f - π(f), where P is the transition kernel, π(f) is the expectation of f under the stationary distribution, and the solution g is the desired control variate.53% similarUnverifiedThe 7-parameter single-plane representation still has room for improvement in fitting accuracy for curved surfaces and thin structures.52% similar
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