Backport the norm-network belief-propagation contraction fix to v0.10 - #183
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…on operands (#182) ## Summary Belief-propagation message updates on a `NormNetwork` handed the doubled vertex `ket * conj(bra)` to `contract_network` as one operand, hiding the physical index the layers share and forcing the doubled tensor every sweep, χ^(2 * degree) not χ^(degree + 1). Passing the layers separately lets the order interleave the messages. --------- Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## release-0.10 #183 +/- ##
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+ Coverage 85.79% 85.83% +0.04%
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Files 15 15
Lines 683 685 +2
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+ Hits 586 588 +2
Misses 97 97
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Summary
Backports #182 to the 0.10 release line, so belief-propagation message updates on a
NormNetworkstop forming the doubledket * conj(bra)tensor before absorbing a message.