Machine learning is built on three mathematical pillars: linear algebra, calculus, and probability theory. Linear algebra describes models through vectors, matrices, and transformations. Calculus enables model training through differentiation and gradient descent optimization. Probability theory provides the framework for making predictions under uncertainty, including concepts like expected value, entropy, and information theory. The guide covers essential topics from vector spaces and matrix operations to multivariable calculus and Bayes' theorem, providing a structured learning path from beginner to advanced understanding of neural networks.