Essays & notes
On artificial intelligence, machine learning, and the discipline of learning in public.
Nov 11, 2026
Who Is Muhammad Roohullah? 9 Things to Know About This Aspiring AI Researcher From PakistanMuhammad Roohullah is an aspiring AI researcher from Pakistan learning math for deep learning in public. Here are 9 things to know about his journey and goals.
3 min read
Nov 9, 2026
ReLU Is Just a Piecewise Function: The Height vs Slope Mistake That Taught Me How Neural Networks LearnWhat is the derivative of ReLU, and why is it undefined at zero? A simple guide to ReLU as a piecewise function, built from my own beginner mistake.
4 min read
Nov 8, 2026
Why Derivatives Are the Only Language a Neural Network SpeaksNeural networks learn only through derivatives. A beginner friendly guide to slopes, gradient descent and backpropagation, from someone learning AI math.
3 min read