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Levi Neuwirth 2026-05-16 19:20:57 -04:00
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<title id="mark-title-index-period">A small rooted tree above an index-period rho-orbit, joined by a dashed abstraction arrow</title>
<desc>A frontispiece mark for "Index-Period Normal Forms for Monoid-Aggregated Recursive Summaries." The upper figure is a small rooted tree with one node marked: the child whose contribution is being analyzed. The lower figure is a rho-shape orbit — a pre-periodic tail of three points leading into a four-cycle — the classical picture of an element's index and period in a finite monoid. The dashed arrow between them is the paper's central move: abstract from the combinatorial tree to the algebraic invariant of one element's contribution.</desc>
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