Infinite-order monodromy conjecture for positive-geometric-genus surface singularities

Let V={f=0}V = \{f = 0\} be a 22-dimensional weighted-homogeneous isolated hypersurface singularity with rational homology 33-sphere link YY, Milnor fiber MM, and monodromy ψ\psi of its Milnor fibration. The geometric genus of VV is denoted by pg(V)p_g(V). Infinite-order monodromy conjecture. The answer to whether ψ\psi has infinite order in the smooth mapping class group MCG(M)\operatorname{MCG}(M) is affirmative when pg(V)>0p_g(V)>0. The claim extends the known affirmative result for pg(V)=1p_g(V)=1 and contrasts with the negative answer for ADE singularities, which have pg(V)=0p_g(V)=0; the general case remains open.

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Primary source

Hokuto Konno, Jianfeng Lin, Anubhav Mukherjee and Juan Muñoz-Echániz, “On four-dimensional Dehn twists and Milnor fibrations”, arXiv:2409.11961 (2024).

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