Identity Matrix
Domain: Math & Logic for AI
🎯 Motivation
A matrix with 1s on the diagonal and 0s elsewhere. Multiplying by it changes nothing.
📋 Concrete Example
The 3x3 identity is [[1,0,0],[0,1,0],[0,0,1]]. Any matrix times identity equals itself.
🔗 Analogy
Like multiplying a number by 1 - the value stays exactly the same.