What is a convex cost function?
Updated May 15, 2026
Short answer
A convex cost function has a single global minimum.
Deep explanation
Convex functions ensure optimization algorithms converge reliably without getting stuck in local minima.
Real-world example
Linear regression uses convex cost functions.
Common mistakes
- Assuming all ML models have convex loss.
Follow-up questions
- Why is convexity important?
- Are neural networks convex?