Skip to content

Add rrule for transpose #319

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
Jutho merged 2 commits into from
Nov 29, 2025
Merged

Add rrule for transpose #319

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
3f01be8
add rrule for transpose
lkdvos Nov 29, 2025
af4c611
add test rrule transpose
lkdvos Nov 29, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
10 changes: 10 additions & 0 deletions ext/TensorKitChainRulesCoreExt/linalg.jl
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -69,6 +69,16 @@ function ChainRulesCore.rrule(
return permute(tsrc, p; copy = true), permute_pullback
end

function ChainRulesCore.rrule(
::typeof(transpose), tsrc::AbstractTensorMap, p::Index2Tuple; copy::Bool = false
)
function transpose_pullback(Δtdst)
invp = TensorKit._canonicalize(TupleTools.invperm(linearize(p)), tsrc)
return NoTangent(), transpose(unthunk(Δtdst), invp; copy = true), NoTangent()
end
return transpose(tsrc, p; copy = true), transpose_pullback
end

function ChainRulesCore.rrule(::typeof(tr), A::AbstractTensorMap)
tr_pullback(Δtr) = NoTangent(), Δtr * id(domain(A))
return tr(A), tr_pullback
Expand Down
1 change: 1 addition & 0 deletions test/autodiff/ad.jl
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -293,6 +293,7 @@ for V in spacelist
C = randn(T, domain(A), codomain(A))
test_rrule(*, A, C)

test_rrule(transpose, A, ((2, 5, 4), (1, 3)))
symmetricbraiding && test_rrule(permute, A, ((1, 3, 2), (5, 4)))
test_rrule(twist, A, 1)
test_rrule(twist, A, [1, 3])
Expand Down
Loading