v0.5.0

In a nutshell

Implicit functions have become more flexible:

• byproducts are optional, and handled automatically via dispatch
• additional positional arguments are supported but not differentiated
• the conditions can be differentiated using a different backend

The linear solver has been generalized:

• it can be chosen among "implicit" and "direct"
• the direct linear solver caches the LU factorization for each pullback or pushforward
• it returns NaNs when the solve fails instead of erroring

General reliability of the package has improved thanks to extensive testing:

• with standard arrays, static arrays and sparse arrays (experimental)
• leveraging ChainRulesTestUtils.jl

See the brand new FAQ page in the docs for more details.

What's Changed

• Return the output only from ImplicitFunction not the byproduct by default by @mohamed82008 in #56
• No differentiating byproducts by @gdalle in #61
• No byproduct by default by @mohamed82008 in #57
• cache the LU factorisation in the direct linear solver and better static array support by @mohamed82008 in #64
• test the output type of the forward function when a byproduct exists by @mohamed82008 in #76
• Fix docs and change constructor by @gdalle in #81
• NaNs for linear solvers when failed by @gdalle in #83
• Add precompilation workflows for ForwardDiff and Zygote by @gdalle in #85
• Transparent handling of byproduct by @gdalle in #86
• Customize backend for conditions by @gdalle in #87
• Fix wrong nb of pullbacks by @gdalle in #91
• Accept nondifferentiated args by @thorek1 in #89
• Copy README into docs by @gdalle in #93
• Add warning when linear solver returns NaNs by @gdalle in #94
• Add benchmarks by @gdalle in #95
• Add warning for sparse arrays by @gdalle in #96
• Fix some issues related to sparse and static arrays by @gdalle in #97
• Plotting benchmarks by @gdalle in #99
• Performance fixes by @gdalle in #100
• Shorten code by @gdalle in #102
• Verbose or not for solver by @gdalle in #103
• 2d benchmarks by @gdalle in #104
• Output size is kwarg in benchmarks by @gdalle in #105
• Back to b linop by @gdalle in #106
• Add judgement script by @gdalle in #110
• Test different shapes for x and y by @gdalle in #109
• Dense jacobians by @gdalle in #111
• Better document test_rrule tweak by @gdalle in #113
• Simpler tests that work with SparseArrays by @gdalle in #114
• Bump version to 0.5.0 by @gdalle in #115

New Contributors

• @thorek1 made their first contribution in #89

Full Changelog: v0.4.4...v0.5.0