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fixes for more stringent TensorKit multifusion spacechecks #528

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Merged
lkdvos merged 1 commit into from
Sep 25, 2026
Merged

fixes for more stringent TensorKit multifusion spacechecks #528

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2 changes: 1 addition & 1 deletion src/algorithms/derivatives/mpo_derivatives.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -323,7 +323,7 @@ function (H::PrecomputedCDerivative)(x::MPSBondTensor)

TC = TensorOperations.promote_contract(scalartype(x), scalartype(H))
xR = TensorOperations.tensoralloc_contract(
TC, x, ((1,), (2,)), false, R, ((1,), (2, 3)), false, ((1, 2), (3,)), Val(true), allocator
TC, x, ((1,), (2,)), false, R, ((1,), (3, 2)), false, ((1, 3), (2,)), Val(true), allocator
)
mul_front!(xR, x, R, One(), Zero(), backend, allocator)
LxR = L * xR
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6 changes: 3 additions & 3 deletions test/symmetries/multifusion.jl
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Expand Up @@ -53,14 +53,14 @@ module TestMultifusion

@testset "InfiniteMPS construction" begin
for (P, V) in bad_fusions
@test_throws ArgumentError InfiniteMPS([P], [V])
@test_throws SpaceMismatch InfiniteMPS([P], [V])
end
end

@testset "FiniteMPS construction" begin
for (P, V) in bad_fusions
@test_warn "no fusion channels available at site 2" FiniteMPS(rand(2:100), P, V)
@test_warn "no fusion channels available at site 2" FiniteMPS(rand(2:100), P, V; left = V, right = V)
@test_throws ArgumentError FiniteMPS(rand(2:100), P, V)
@test_throws SpaceMismatch FiniteMPS(rand(2:100), P, V; left = V, right = V)
end
end

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