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Hopf algebras on decorated noncrossing arc diagrams

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Figure 1. The weak order (left) and the Tamari lattice (right).
Figure 2. The noncrossing arc diagrams δ(σ) (bottom) and δ(σ) (top) for the permutations σ = 2537146, 2531746, 2513746, and 2513476.
Figure 3. The forcing order on arcs of A 4 (left) and some examples of arc ideals A <k n,s,e,w (right) whose associated lattice congruence classes correspond to permutations, binary trees, binary sequences, diagonal rectangulations,  per-mutrees, sashes
Figure 4. The noncrossing arc diagrams η
+2

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