Lipa's pseudo-monodromy marker conjecture for herds

Let M\mathfrak{M} be the Mandelbrot set, let HH be a hyperbolic component of M\mathfrak{M}, and let v\underline{v} be a word over {A,B}\{A,B\}. Let H\mathcal{H} be the relevant parameter-space set with basepoint \ast, let γπ1(H,)\gamma\in\pi_1(\mathcal{H},\ast) wind around the v\underline{v}-herd of the wake WH\mathcal{W}_H, and let H1,,HLH_1,\dots,H_L be the hyperbolic components conspicuous to HH. Define

wivK(Hi).\underline{w}^i\equiv\underline{v}\ast K(H_i).

Lipa's pseudo-monodromy marker conjecture. The monodromy action of ρ(γ)\rho(\gamma) is described by compositions of the markers

W{w1,,wL}.W\equiv\{\underline{w}^1,\dots,\underline{w}^L\}.

The conjecture proposes a combinatorial description of monodromy actions around herds using herd codings and kneading sequences; its status is unresolved in the supplied text.

Sources & referencesView supporting material

Primary source

Yutaka Ishii and Thomas Richards, “Pseudo-monodromy and the Mandelbrot set”, arXiv:2405.02204 (2025).

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