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What is Machine Learning?

Published: June 20, 2026 • 6 min read
Home Blog What is Machine Learning?

Machine Learning (ML) is a subset of artificial intelligence focused on building systems that learn from data. Instead of being explicitly programmed with rules, these systems analyze millions of historical parameters to detect underlying statistical patterns.

The Learning Paradigm

At its core, ML builds mathematical functions mapping inputs (features) to outputs (labels). During training, algorithms iteratively optimize internal parameters (weights and biases) to minimize predictive error, calculated via a cost function.

Three Core ML Types:

  • Supervised Learning: Training datasets contain annotated inputs and outputs (e.g., linear regression, classification).
  • Unsupervised Learning: Finding hidden clusters in unlabelled data structures (e.g., K-Means clustering, PCA).
  • Reinforcement Learning: Agents optimizing behavior inside an environment based on reward feedbacks (e.g., Q-learning).

Why It Matters for the Olympiad

Rather than memorizing standard frameworks, candidates should focus on logic: understanding how decision trees split features, how neural weights update via backpropagation, and how to prevent model overfitting.

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