Add tree-topology TT-ID#4
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Generalizes TT-ID to arbitrary tree topologies using libtorch tensors. TreeTopology owns the recursion via leaves_to_root/root_to_leaves iterators; TensorTree's eval/sum/overlap are flat edge-local sweeps that absorb one neighbor at a time, with length-1 axes kept so leg positions stay stable. tree_tt_id mirrors the chain TT-CI: per-edge row/col ID with pivots stored as MultiIndex on each directed edge, plus addPivotsAllBonds for global-pivot injection. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
…a-b185bf # Conflicts: # CMakeLists.txt
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Generalizes TT-ID to arbitrary tree topologies using libtorch tensors. TreeTopology owns the recursion via leaves_to_root/root_to_leaves iterators; TensorTree's eval/sum/overlap are flat edge-local sweeps that absorb one neighbor at a time, with length-1 axes kept so leg positions stay stable. tree_tt_id mirrors the chain TT-CI: per-edge row/col ID with pivots stored as MultiIndex on each directed edge, plus addPivotsAllBonds for global-pivot injection.