I need to optimize a function f(u) defined over a closed domain u =[0,1]. I was happily using Newton’s method and FowardDiff for this until I tried upgrading to v1.0. Now, ForwardDiff intentionally gives the derivative on the right of u. This means that while f(u=1.) is defined, f(u=Dual(1.,1.))=Dua…

[image] weymouth: I see this change marked at the top of the README, but I don’t see any suggestions for how to get the derivative on the left of u or any other “designed” approach to deal with closed domains like this. function LeftDeriv(f, x) ForwardDiff.derivative(t -> -f(-t), -x) end

ForwardDiff over closed interval

Specific Domains Optimization (Mathematical)

weymouth June 6, 2025, 1:32pm 5

My use case is pretty specific, so I’m not using Optim.

Topic		Replies	Views
Domain Troubles with Differential Equations Solver (with non-auto-differentiable function inside the ODE def) Numerics question , diffeq	33	3576	August 19, 2018
ForwardDiff & "complicated" functions? General Usage	14	2359	November 16, 2019
Should ForwardDiff.jl issue warnings at non-differentiable points? Optimization (Mathematical) question	12	1505	June 13, 2017
Registering Analytical Derivative with ReverseDiff/ForwardDiff Optimization (Mathematical)	4	805	April 25, 2018
Optimize not working with function that has find_zero Optimization (Mathematical) question	11	1321	May 9, 2019

ForwardDiff over closed interval

Related topics