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Bibliographic record
Abstract
This work is concerned with Mishchenko and Fomenko's celebrated theory of completely integrable systems on a complex semisimple Lie algebra \mathfrak{g} . Their theory associates a maximal Poisson-commutative subalgebra of \mathbb{C}[\mathfrak{g}] to each regular element a\in\mathfrak{g} , and one can assemble free generators of this subalgebra into a moment map F_a:\mathfrak{g}\rightarrow\mathbb{C}^b . This leads one to pose basic structural questions about F_a and its fibres, e.g. questions concerning the singular points and irreducible components of such fibres. We examine the structure of fibres in Mishchenko-Fomenko systems, building on the foundation laid by Bolsinov, Charbonnel-Moreau, Moreau, and others. This includes proving that the critical values of F_a have codimension 1 or 2 in \mathbb{C}^b , and that each codimension is achievable in examples. Our results on singularities make use of a subalgebra \mathfrak{b}^a\subseteq\mathfrak{g} , defined to be the intersection of all Borel subalgebras of \mathfrak{g} containing a . In the case of a non-nilpotent a\in\mathfrak{g}_{\mathrm{reg}} and an element x\in\mathfrak{b}^a , we prove the following: x+[\mathfrak{b}^a,\mathfrak{b}^a] lies in the singular locus of F_a^{-1}(F_a(x)) , and the fibres through points in \mathfrak{b}^a form a \text{rank}(\mathfrak{g}) -dimensional family of singular fibres. We next consider the irreducible components of our fibres, giving a systematic way to construct many components via Mishchenko-Fomenko systems on Levi subalgebras \mathfrak{l}\subseteq\mathfrak{g} . In addition, we obtain concrete results on irreducible components that do not arise from the aforementioned construction. Our final main result is a recursive formula for the number of irreducible components in F_a^{-1}(0) , and it generalizes a result of Charbonnel-Moreau. Illustrative examples are included at the end of this paper.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it