In connection with the article I wrote the other day about the Pythagorean theorem, based on my experience of about 30 years as a cram school teacher, you train in how to use it. Even against enemies ...

In this installment, we will explain a problem on the complex plane from the 2019 Kyoto Prefectural University of Medicine entrance exam. In this series, we go beyond simply presenting the correct ...

Sparse models, though long preferred and pursued by social scientists, can be ineffective or unstable relative to large models, for example, in economic predictions (Giannone et al., 2021). To achieve ...

Static portfolios (the classic 60/40) rely on stationary assumptions — they work beautifully in prolonged bull runs and fail catastrophically in structural market breaks. REGIME-SHIFT builds a dynamic ...

ML IsolationForest + PyTorch autoencoder anomaly detection · supervised stress-day classifier (logistic + random forest) · semi-supervised label propagation · PCA + KMeans + Marchenko-Pastur denoising ...