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Fix contraction of tensors with mixed elementary space types #531

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Fix contraction of tensors with mixed elementary space types #531

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9 changes: 9 additions & 0 deletions src/spaces/homspace.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -321,6 +321,15 @@ function _contractedspace(
return cod ← dom
end

# generic fallback for mixed elementary space type: compose the intermediate spaces
function _contractedspace(
A::HomSpace, (oindA, cindA)::Index2Tuple,
B::HomSpace, (cindB, oindB)::Index2Tuple,
pAB::Index2Tuple
)
return permute(compose(select(A, (oindA, cindA)), select(B, (cindB, oindB))), pAB)
end

function TensorOperations.tensorcontract(
A::HomSpace, pA::Index2Tuple, conjA::Bool,
B::HomSpace, pB::Index2Tuple, conjB::Bool,
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