# Is it possible to do Nested AD ~elegantly~ in Julia? (PINNs)

**URL:** https://discourse.julialang.org/t/is-it-possible-to-do-nested-ad-elegantly-in-julia-pinns/98888
**Category:** General Usage
**Tags:** machine-learning
**Created:** [May 15, 2023, 5:12pm UTC](https://discourse.julialang.org/t/is-it-possible-to-do-nested-ad-elegantly-in-julia-pinns/98888 "2023-05-15T17:12:01Z")
**Posts on this page:** 1
**Showing post:** 21

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### Author: ![Bizzi](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/bizzi/32/51484_2.png) [@Bizzi](https://discourse.julialang.org/u/Bizzi)
#### Post date: [May 17, 2023, 5:46pm UTC](https://discourse.julialang.org/t/is-it-possible-to-do-nested-ad-elegantly-in-julia-pinns/98888/21 "2023-05-17T17:46:02Z")

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I see. So this is a limitation of Zygote + ForwardDiff specifically? I’ll try the implementation with TaylorDiff next. I’m aware that Lux is better behaved than Flux for a variety of applications, but it shouldn’t make a difference in this case, correct? (Given that Lux is also built on top of Zygote).

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