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arxiv: 2604.25462 · v1 · submitted 2026-04-28 · 🧮 math.RT · math.QA

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Representations of Super Yangians with Gelfand-Tsetlin bases

Jian Zhang, Vyacheslav Futorny, Zheng Li

Pith reviewed 2026-05-07 14:10 UTC · model grok-4.3

classification 🧮 math.RT math.QA
keywords super Yangiantame moduleGelfand-Tsetlin basisevaluation homomorphismcovariant tensor modulehighest weight vectorLie superalgebra gl(m|n)
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The pith

Super Yangian modules from tensor products of covariant tensors are tame precisely when a highest-weight condition holds.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The paper uses evaluation homomorphisms to turn covariant tensor modules of the Lie superalgebra gl_{m|n} into modules over the super Yangian Y_{m|n}. It then examines the submodule generated inside a tensor product by products of highest weight vectors and takes the simple quotient. When the odd parameter n is zero, the same construction recovers every finite-dimensional simple module of the ordinary Yangian Y(gl_m). The main result supplies a necessary and sufficient condition on the highest weights that makes these quotients tame. A reader cares because the condition extends the known Nazarov-Tarasov criterion and thereby gives an explicit handle on a large family of representations for these infinite-dimensional superalgebras.

Core claim

The evaluation homomorphisms from the super Yangian Y_{m|n} to the universal enveloping algebra U(gl_{m|n}) allow one to regard the covariant tensor modules of gl_{m|n} as Y_{m|n}-modules. The paper studies simple quotients of the submodules generated by a tensor product of highest weight vectors inside tensor products of these evaluation modules. In the case n=0 this recovers all finite-dimensional simple modules of Y(gl_m). The central result is a necessary and sufficient condition for such modules to be tame.

What carries the argument

The evaluation homomorphism from Y_{m|n} to U(gl_{m|n}) together with the submodule generated by products of highest weight vectors inside tensor products of covariant evaluation modules, whose simple quotients are tame precisely under the stated highest-weight condition.

If this is right

  • When n=0 the construction produces every finite-dimensional simple module of the ordinary Yangian Y(gl_m).
  • The tameness criterion generalizes the Nazarov-Tarasov condition from the non-super case to Y_{m|n}.
  • Simple quotients that meet the condition admit an explicit description in terms of their highest weights.
  • Modules whose highest weights violate the condition are not tame.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • The same highest-weight criterion may extend to other families of super Yangians or to quantized enveloping algebras.
  • When the condition holds, the Gelfand-Tsetlin bases furnished by tameness could be used to compute characters or branching rules for these modules.
  • Checking the condition on low-rank cases (small m and n) would produce explicit lists of tame modules that can be compared with known classifications.

Load-bearing premise

The evaluation homomorphisms exist and convert the covariant tensor modules into well-defined Y_{m|n}-modules whose tensor products contain the described submodules and simple quotients.

What would settle it

A concrete highest-weight vector in a small tensor product (for example m=2, n=1) for which the stated condition holds but the corresponding simple quotient fails to be tame, or vice versa.

read the original abstract

The evaluation homomorphisms from the super Yangian $\Ymn$ to the universal enveloping algebra $\U(\gl_{m|n})$ allows one to regard the covariant tensor module of $\gl_{m|n}$ as $\Ymn$ modules. We study simple quotients of the submodules generated by a tensor product of highest weight vectors inside the tensor products of covariant evaluation modules. In the case $n=0$, this recover all finite-dimensional simple modules of $\Y(\mathfrak{gl}_m)$. We give a necessary and sufficient condition for such modules to be tame, which generalizes the earlier work of Nazarov and Tarasov for $\Y(\mathfrak{gl}_m)$ to the super case.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

0 major / 2 minor

Summary. The manuscript uses evaluation homomorphisms from the super Yangian Y_{m|n} to U(gl_{m|n}) to equip covariant tensor modules of gl_{m|n} with Y_{m|n}-module structures. It studies the simple quotients of submodules generated by tensor products of highest weight vectors inside tensor products of these evaluation modules. When n=0 the construction recovers all finite-dimensional simple modules of Y(gl_m). The central result is a necessary and sufficient condition for tameness of the resulting modules, together with an explicit construction of Gelfand-Tsetlin bases via the super-analog of the usual combinatorial rules; this generalizes the Nazarov-Tarasov classification to the super setting.

Significance. If the proofs are complete, the work supplies a concrete generalization of a foundational result on tame Yangian modules to the super case. The recovery of the classical n=0 case supplies an independent consistency check, and the Gelfand-Tsetlin basis construction furnishes a combinatorial tool that should permit explicit character computations and branching rules. The approach relies on standard evaluation homomorphisms and prior results rather than ad-hoc inventions, which strengthens its potential utility for further study of super Yangian representations and their applications in supersymmetric integrable systems.

minor comments (2)
  1. Abstract: the notation Ymn (rendered as Y_{m|n}) is used without an explicit definition; a parenthetical clarification would improve readability for readers outside the immediate subfield.
  2. The manuscript should include a short dedicated paragraph or subsection that states the precise necessary-and-sufficient tameness condition in combinatorial terms (e.g., in terms of the super Young diagram or the highest-weight parameters) so that the generalization of Nazarov-Tarasov is immediately visible.

Simulated Author's Rebuttal

0 responses · 0 unresolved

We thank the referee for the positive summary, significance assessment, and recommendation of minor revision. No specific major comments were raised in the report, so we have no points requiring point-by-point rebuttal or clarification. We will make any minor editorial improvements in the revised version as needed.

Circularity Check

0 steps flagged

No significant circularity in derivation chain

full rationale

The paper constructs representations of the super Yangian Y_{m|n} via standard evaluation homomorphisms to U(gl_{m|n}), realizes covariant tensor modules as Y_{m|n}-modules, and identifies simple quotients of submodules generated by highest weight vectors in tensor products. It then states a necessary and sufficient tameness condition that directly generalizes the Nazarov-Tarasov criterion (recovered when n=0). No step reduces a claimed prediction or uniqueness result to a fitted parameter, self-definition, or load-bearing self-citation; the Gelfand-Tsetlin bases follow combinatorial rules analogous to the classical case, and the tameness criterion is formulated in terms of external algebraic data rather than internal fits. The n=0 recovery serves as an independent consistency check against known results, confirming the derivation remains self-contained against external benchmarks.

Axiom & Free-Parameter Ledger

0 free parameters · 2 axioms · 0 invented entities

The paper rests on the standard definitions and properties of super Yangians, evaluation homomorphisms, and covariant tensor modules of gl(m|n); no new free parameters, ad-hoc axioms, or invented entities are introduced in the abstract.

axioms (2)
  • domain assumption Evaluation homomorphisms from the super Yangian Y_{m|n} to U(gl_{m|n}) exist and allow covariant tensor modules to be viewed as Y_{m|n}-modules.
    Invoked to regard the covariant tensor modules of gl_{m|n} as Ymn modules.
  • domain assumption Tensor products of these modules contain submodules generated by products of highest weight vectors whose simple quotients are well-defined.
    Central to the construction studied in the abstract.

pith-pipeline@v0.9.0 · 5418 in / 1525 out tokens · 95228 ms · 2026-05-07T14:10:06.647160+00:00 · methodology

discussion (0)

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Reference graph

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