# Who invented the gradient descent algorithm?

In connection to the question "Who invented the gradient?", I want to know who invented the gradient descent algorithm?

Instead of the gradient vector Cauchy simply works with the partial derivatives $$X=f'_x,Y=f'_y,Z=f'_z,...$$. He takes small $$\theta$$, sets up the equation $$\Theta=f(X-\theta x, Y-\theta y, Z-\theta z,...),$$ and, in one of the variants, recommends finding $$\theta$$ from $$\Theta'_\theta=0$$.