https://rebanto.vercel.app/blogNotes on AI, software engineering, and research.en-ushttps://rebanto.vercel.app/blog/the-angle-between-two-sentenceshttps://rebanto.vercel.app/blog/the-angle-between-two-sentencesBefore a chatbot can answer from your documents, something has to find the right paragraph. That step turns every sentence into an arrow and picks whichever arrow points the same way as your question.Tue, 28 Jul 2026 00:00:00 GMT https://rebanto.vercel.app/blog/percolation-and-moving-moneyhttps://rebanto.vercel.app/blog/percolation-and-moving-moneyA payment route only works while the network around it stays connected. A few small simulations show how random failures decide which route is actually best.Sun, 26 Jul 2026 00:00:00 GMT https://rebanto.vercel.app/blog/backpropagation-one-neuron-at-a-timehttps://rebanto.vercel.app/blog/backpropagation-one-neuron-at-a-timeBackpropagation for a single neuron, worked out by hand in NumPy: where each gradient comes from and how it moves a weight.Tue, 21 Jul 2026 00:00:00 GMT