2207.14602
Analytic Semiroots for Plane Branches and Singular Foliations
Felipe Cano, Nuria Corral, David Senovilla-Sanz
correctmedium confidence
- Category
- Not specified
- Journal tier
- Specialist/Solid
- Processed
- Sep 28, 2025, 12:56 AM
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Audit review
The paper’s Theorem 1.1 and its in-text version Theorem 8.8 assert that for each i and each free point P on the last divisor E, the semimodule of differential values of the analytic semiroot C^i_P equals Λ_{i−1}, and that the truncated list (ω_{−1}, ω_0, …, ω_{i−1}; ω_i) is an extended/enlarged standard basis; the proof proceeds via Delorme’s decomposition (Theorem 8.5) and a careful comparison of ν_E and ν_C, notably Lemma 8.9 and Corollary 8.10, together with the structural results on critical divisorial orders and axes (Theorem 7.13) and Appendix C’s raising-ν_E lemma. These results match the candidate’s conclusion exactly (Λ_{C^i_P} = Λ_{i−1} and truncated basis), though the model argues by a valuation-grading “ν_E-division” and invariance by ω_i rather than by Delorme’s decomposition. The model’s sketch is broadly correct but omits some technical lemmas used in the paper—e.g., the uniformity of leading-term cancellations and a formal division/raising-ν_E step (cf. Theorem 8.5 and Lemma C.1). Hence both are correct, with different proof styles and the model’s requiring minor completion. Key paper pointers: Theorem 1.1 (statement), Theorem 8.8 (main result), Lemma 8.9 (values along C^i_P), Theorem 8.5 (Delorme), and the critical order framework around Theorem 7.13 and Appendix C (raising ν_E) .
Referee report (LaTeX)
\textbf{Recommendation:} minor revisions \textbf{Journal Tier:} specialist/solid \textbf{Justification:} This work clarifies the structure of semimodules of differential values for analytic semiroots attached to enlarged standard bases of cusps. The main theorem (that the semimodule for the analytic semiroot is obtained by truncating the original basis, and the truncated list forms an extended standard basis) is natural and valuable. The proof is complete, relying on well-organized preliminaries (critical orders, axes, reachability) and Delorme's decomposition for 1-forms, for which the authors provide an elementary proof in the appendix. Exposition is largely clear; a few cross-references could be streamlined and certain definitions slightly consolidated.