Gradient-based methods

copt.minimize_PGD(f_grad, x0[, g_prox, tol, …])	Proximal gradient descent.
copt.minimize_APGD(f_grad, x0[, g_prox, …])	Accelerated proximal gradient descent.
copt.minimize_TOS(f_grad, x0[, g_prox, …])	Davis-Yin three operator splitting method.