This note identifies the semistable rank-one wall and classifies its fibers, suggesting implications for fiber atlases.
This note gives an all-length fiber atlas for endpoint-compression words. It identifies the rank-one wall as a semistable simple normal-crossing degeneration, determines its dual and contact-order simplices, and classifies the nonnegative wall and corner fibers.
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Hiroyuki Shioiri (2026) studied this question.
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