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# Optimization and root finding (`scipy.optimize`)

## Optimization

### General-purpose

`minimize`(fun, x0[, args, method, jac, hess, ...]) | Minimization of scalar function of one or more variables.
`fmin`(func, x0[, args, xtol, ftol, maxiter, ...]) | Minimize a function using the downhill simplex algorithm.
`fmin_powell`(func, x0[, args, xtol, ftol, ...]) | Minimize a function using modified Powell’s method. This method
`fmin_cg`(f, x0[, fprime, args, gtol, norm, ...]) | Minimize a function using a nonlinear conjugate gradient algorithm.
`fmin_bfgs`(f, x0[, fprime, args, gtol, norm, ...]) | Minimize a function using the BFGS algorithm.
`fmin_ncg`(f, x0, fprime[, fhess_p, fhess, ...]) | Unconstrained minimization of a function using the Newton-CG method.
`leastsq`(func, x0[, args, Dfun, full_output, ...]) | Minimize the sum of squares of a set of equations.

### Constrained (multivariate)

`fmin_l_bfgs_b`(func, x0[, fprime, args, ...]) | Minimize a function func using the L-BFGS-B algorithm.
`fmin_tnc`(func, x0[, fprime, args, ...]) | Minimize a function with variables subject to bounds, using
`fmin_cobyla`(func, x0, cons[, args, ...]) | Minimize a function using the Constrained Optimization BY Linear
`fmin_slsqp`(func, x0[, eqcons, f_eqcons, ...]) | Minimize a function using Sequential Least SQuares Programming
`nnls`(A, b) | Solve `argmin_x || Ax - b ||_2` for `x>=0`. This is a wrapper

### Global

`anneal`(func, x0[, args, schedule, ...]) | Minimize a function using simulated annealing.
`basinhopping`(func, x0[, niter, T, stepsize, ...]) | Find the global minimum of a function using the basin-hopping algorithm ..
`brute`(func, ranges[, args, Ns, full_output, ...]) | Minimize a function over a given range by brute force.

### Scalar function minimizers

`minimize_scalar`(fun[, bracket, bounds, ...]) | Minimization of scalar function of one variable.
`fminbound`(func, x1, x2[, args, xtol, ...]) | Bounded minimization for scalar functions.
`brent`(func[, args, brack, tol, full_output, ...]) | Given a function of one-variable and a possible bracketing interval, return the minimum of the function isolated to a fractional precision of tol.
`golden`(func[, args, brack, tol, full_output]) | Return the minimum of a function of one variable.
`bracket`(func[, xa, xb, args, grow_limit, ...]) | Bracket the minimum of the function.

### Rosenbrock function

`rosen`(x) | The Rosenbrock function.
`rosen_der`(x) | The derivative (i.e.
`rosen_hess`(x) | The Hessian matrix of the Rosenbrock function.
`rosen_hess_prod`(x, p) | Product of the Hessian matrix of the Rosenbrock function with a vector.

## Fitting

`curve_fit`(f, xdata, ydata[, p0, sigma]) | Use non-linear least squares to fit a function, f, to data.

## Root finding

### Scalar functions

`brentq`(f, a, b[, args, xtol, rtol, maxiter, ...]) | Find a root of a function in given interval.
`brenth`(f, a, b[, args, xtol, rtol, maxiter, ...]) | Find root of f in [a,b].
`ridder`(f, a, b[, args, xtol, rtol, maxiter, ...]) | Find a root of a function in an interval.
`bisect`(f, a, b[, args, xtol, rtol, maxiter, ...]) | Find root of a function within an interval.
`newton`(func, x0[, fprime, args, tol, ...]) | Find a zero using the Newton-Raphson or secant method.

Fixed point finding:

`fixed_point`(func, x0[, args, xtol, maxiter]) | Find a fixed point of the function.

### Multidimensional

General nonlinear solvers:

`root`(fun, x0[, args, method, jac, tol, ...]) | Find a root of a vector function.
`fsolve`(func, x0[, args, fprime, ...]) | Find the roots of a function.
`broyden1`(F, xin[, iter, alpha, ...]) | Find a root of a function, using Broyden’s first Jacobian approximation.
`broyden2`(F, xin[, iter, alpha, ...]) | Find a root of a function, using Broyden’s second Jacobian approximation.

Large-scale nonlinear solvers:

`newton_krylov`(F, xin[, iter, rdiff, method, ...]) | Find a root of a function, using Krylov approximation for inverse Jacobian.
`anderson`(F, xin[, iter, alpha, w0, M, ...]) | Find a root of a function, using (extended) Anderson mixing.

Simple iterations:

`excitingmixing`(F, xin[, iter, alpha, ...]) | Find a root of a function, using a tuned diagonal Jacobian approximation.
`linearmixing`(F, xin[, iter, alpha, verbose, ...]) | Find a root of a function, using a scalar Jacobian approximation.
`diagbroyden`(F, xin[, iter, alpha, verbose, ...]) | Find a root of a function, using diagonal Broyden Jacobian approximation.

`Additional information on the nonlinear solvers`

## Utility Functions

`line_search`(f, myfprime, xk, pk[, gfk, ...]) | Find alpha that satisfies strong Wolfe conditions.
`check_grad`(func, grad, x0, *args) | Check the correctness of a gradient function by comparing it against a (forward) finite-difference approximation of the gradient.
`show_options`(solver[, method]) | Show documentation for additional options of optimization solvers.

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