# Partial Derivative

> Source: https://sukruyusufkaya.com/en/glossary/kismi-turev
> Updated: 2026-05-13T21:07:30.383Z
> Type: glossary
> Category: matematik-istatistik-optimizasyon
**TLDR:** A derivative that measures the change of a multivariable function with respect to only one variable.

<p>A partial derivative examines the effect of a single variable while holding other variables constant in a multivariable function. Since machine learning loss functions usually depend on many parameters, partial derivatives are extremely important. Understanding how each parameter affects the output is essential for determining the correct update direction. The mathematical foundation of parameter optimization in deep learning relies heavily on this logic. Partial derivatives are precision tools for navigating high-dimensional systems.</p>