pith. sign in

arxiv: 2606.25660 · v1 · pith:A7VQ463Snew · submitted 2026-06-24 · ❄️ cond-mat.stat-mech · cond-mat.str-el· hep-th· math-ph· math.MP

Lattice non-invertible symmetry from non-commuting transfer matrices

Pith reviewed 2026-06-25 19:46 UTC · model grok-4.3

classification ❄️ cond-mat.stat-mech cond-mat.str-elhep-thmath-phmath.MP
keywords Onsager algebraduality defectstransfer matricesXXZ chainTambara-Yamagaminon-invertible symmetryYang-Baxter relationlattice models
0
0 comments X

The pith

In the XXZ spin chain at roots of unity, a non-Abelian algebra of transfer matrices realizes the Onsager algebra and its duality automorphism as a matrix product operator obeying Tambara-Yamagami fusion rules.

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

The paper establishes a direct link between Onsager symmetry, duality defects, and quantum integrability in the XXZ spin chain when the anisotropy parameter takes roots-of-unity values. By employing an unbalanced version of the Yang-Baxter relation, the authors generate a non-commuting set of transfer matrices whose algebra closes into the Onsager algebra. A specific matrix product operator constructed from the τ₂-model transfer matrices implements the duality automorphism of this algebra. This operator satisfies the fusion rules of the ℤ_N Tambara-Yamagami category, thereby providing an explicit lattice embedding of the topological defect lines that appear in the free compactified boson conformal field theory.

Core claim

Using a non-Abelian algebra of transfer matrices governed by an unbalanced version of the Yang-Baxter/RLL relation, we construct an explicit lattice realization of the Onsager algebra and its duality automorphism. The duality is represented by a matrix product operator related to the transfer matrices of the τ₂ model. We show that this operator obeys ℤ_N Tambara-Yamagami fusion rules and therefore realizes on the lattice the topological defect lines of the free compactified boson conformal field theory. Our results identify non-Abelian integrability as a natural framework for the emergence of the Onsager symmetry and categorical dualities in lattice models.

What carries the argument

Non-Abelian algebra of transfer matrices from the unbalanced Yang-Baxter/RLL relation, which produces the Onsager algebra and its duality-representing matrix product operator.

If this is right

  • The duality automorphism appears as an explicit lattice operator built from transfer matrices.
  • This operator obeys the ℤ_N Tambara-Yamagami fusion rules.
  • Non-Abelian integrability supplies a setting in which Onsager symmetry and categorical dualities arise together.
  • The construction supplies a lattice model whose defects match those of the compactified boson CFT.

Where Pith is reading between the lines

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

  • Similar constructions could apply to other integrable spin chains at roots of unity to generate non-invertible symmetries.
  • The matrix product operator approach may allow numerical study of defect dynamics in finite-size systems.
  • This framework might connect Onsager symmetry to other non-invertible symmetries studied in statistical mechanics.
  • Extensions to higher dimensions or different algebras could be explored by modifying the transfer matrix relations.

Load-bearing premise

The unbalanced Yang-Baxter/RLL relation produces a non-Abelian algebra that admits an explicit matrix product operator realizing the duality automorphism with the stated fusion rules.

What would settle it

Direct verification for small N that the product of the duality operator with itself or with other operators reproduces the predicted Tambara-Yamagami fusion outcomes.

Figures

Figures reproduced from arXiv: 2606.25660 by Eric Vernier, Masahito Yamazaki, Yuan Miao.

Figure 1
Figure 1. Figure 1: FIG. 1. The transfer matrix of the (asymmetric) six-vertex [PITH_FULL_IMAGE:figures/full_fig_p002_1.png] view at source ↗
Figure 3
Figure 3. Figure 3: FIG. 3. The train argument is used to derive quadratic [PITH_FULL_IMAGE:figures/full_fig_p003_3.png] view at source ↗
read the original abstract

We establish a direct connection between Onsager symmetry, duality defects, and quantum integrability in the XXZ spin chain at roots of unity, $\Delta=(q+q^{-1})/2$ with $q^N=\pm1$. Using a non-Abelian algebra of transfer matrices governed by an unbalanced version of the Yang--Baxter/RLL relation, we construct an explicit lattice realization of the Onsager algebra and its duality automorphism. The duality is represented by a matrix product operator related to the transfer matrices of the $\tau_2$ model. We show that this operator obeys $\mathbb{Z}_N$ Tambara--Yamagami fusion rules and therefore realizes on the lattice the topological defect lines of the free compactified boson conformal field theory. Our results identify non-Abelian integrability as a natural framework for the emergence of the Onsager symmetry and categorical dualities in lattice models.

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 / 3 minor

Summary. The manuscript claims to establish a direct connection between Onsager symmetry, duality defects, and quantum integrability in the XXZ spin chain at roots of unity, Δ=(q+q^{-1})/2 with q^N=±1. Using a non-Abelian algebra of transfer matrices governed by an unbalanced version of the Yang-Baxter/RLL relation, the authors construct an explicit lattice realization of the Onsager algebra and its duality automorphism. The duality is represented by a matrix product operator related to the transfer matrices of the τ₂ model; this operator is shown to obey ℤ_N Tambara-Yamagami fusion rules and therefore realizes on the lattice the topological defect lines of the free compactified boson CFT.

Significance. If the explicit constructions and verifications hold, the work supplies a concrete lattice model in which non-Abelian integrability produces both the Onsager algebra and categorical (non-invertible) dualities, directly linking transfer-matrix algebras to CFT defect lines. The explicit MPO construction and fusion-rule verification constitute a substantive technical contribution.

minor comments (3)
  1. [Abstract] The abstract and introduction would benefit from a brief, self-contained statement of the precise form of the unbalanced RLL relation (e.g., the deviation from the standard YB equation) before the main construction is invoked.
  2. Notation for the MPO and the generators of the Onsager algebra should be introduced once with a clear table or diagram relating them to the τ₂ transfer matrices; repeated redefinitions in later sections reduce readability.
  3. The fusion-rule verification (presumably in the section containing the explicit MPO algebra) would be easier to follow if the authors include a short appendix tabulating the fusion coefficients for small N (e.g., N=3,4) alongside the CFT expectations.

Simulated Author's Rebuttal

0 responses · 0 unresolved

We thank the referee for the positive assessment of our manuscript, the recognition of its technical contributions, and the recommendation for minor revision. No specific major comments were raised in the report.

Circularity Check

0 steps flagged

No significant circularity; explicit construction is self-contained

full rationale

The paper asserts an explicit construction of the non-Abelian transfer-matrix algebra via the unbalanced Yang-Baxter/RLL relation, followed by direct verification that the resulting MPO satisfies the Z_N Tambara-Yamagami fusion rules. No equations or claims in the abstract reduce a prediction to a fitted input, rename a known result, or rely on load-bearing self-citations whose content is unverified. The derivation chain consists of algebraic construction and explicit checking, which are independent of the target CFT interpretation. This matches the default expectation of a non-circular explicit lattice realization.

Axiom & Free-Parameter Ledger

0 free parameters · 0 axioms · 0 invented entities

Abstract-only review; no explicit free parameters, axioms, or invented entities can be extracted. The construction appears to rest on standard Yang-Baxter relations and the definition of the Onsager algebra from prior literature.

pith-pipeline@v0.9.1-grok · 5697 in / 1232 out tokens · 27348 ms · 2026-06-25T19:46:27.679797+00:00 · methodology

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.

Reference graph

Works this paper leans on

105 extracted references · 19 linked inside Pith

  1. [1]

    train argument

    Phys- ically, they correspond to inserting a magnetic field in the one-dimensional ring where the spins live, leading to a non-vanishing phase for the spin exchange interaction. This simplifies the subsequent presentation; however, our main results also hold for periodic systems, with the two cases equivalent forLa multiple of 2N. By a simple unitary chan...

  2. [2]

    Yang, Some exact results for the many body prob- lems in one dimension with repulsive delta function in- teraction, Phys

    C.-N. Yang, Some exact results for the many body prob- lems in one dimension with repulsive delta function in- teraction, Phys. Rev. Lett.19, 1312 (1967)

  3. [3]

    R. J. Baxter, Partition function of the eight vertex lattice model, Annals Phys.70, 193 (1972)

  4. [4]

    R. J. Baxter,Exactly solved models in statistical mechan- ics(Academic Press, 1982)

  5. [5]

    L. D. Faddeev, How algebraic Bethe ansatz works for integrable model, inLes Houches School of Physics: As- trophysical Sources of Gravitational Radiation(1996) pp. pp. 149–219, arXiv:hep-th/9605187

  6. [6]

    Prosen, Open XXZ Spin Chain: Nonequilibrium Steady State and a Strict Bound on Ballistic Transport, Phys

    T. Prosen, Open XXZ Spin Chain: Nonequilibrium Steady State and a Strict Bound on Ballistic Transport, Phys. Rev. Lett.106, 217206 (2011), arXiv:1103.1350 [cond-mat.str-el]

  7. [7]

    Prosen and E

    T. Prosen and E. Ilievski, Families of Quasilocal Con- servation Laws and Quantum Spin Transport, Phys. Rev. Lett.111, 057203 (2013), arXiv:1306.4498 [cond- mat.stat-mech]

  8. [8]

    Ilievski, J

    E. Ilievski, J. De Nardis, B. Wouters, J.-S. Caux, F. H. L. Essler, and T. Prosen, Complete Generalized Gibbs En- sembles in an Interacting Theory, Phys. Rev. Lett.115, 6 157201 (2015), arXiv:1507.02993 [quant-ph]

  9. [9]

    Ilievski, M

    E. Ilievski, M. Medenjak, T. Prosen, and L. Zadnik, Quasilocal charges in integrable lattice systems, J. Stat. Mech.1606, 064008 (2016), arXiv:1603.00440 [cond- mat.stat-mech]

  10. [10]

    Gaiotto, A

    D. Gaiotto, A. Kapustin, N. Seiberg, and B. Wil- lett, Generalized Global Symmetries, JHEP02, 172, arXiv:1412.5148 [hep-th]

  11. [11]

    E. P. Verlinde, Fusion Rules and Modular Transforma- tions in 2D Conformal Field Theory, Nucl. Phys. B300, 360 (1988)

  12. [12]

    Frohlich, J

    J. Frohlich, J. Fuchs, I. Runkel, and C. Schweigert, Du- ality and defects in rational conformal field theory, Nucl. Phys. B763, 354 (2007), arXiv:hep-th/0607247

  13. [13]

    Aasen, R

    D. Aasen, R. S. K. Mong, and P. Fendley, Topological Defects on the Lattice I: The Ising model, J. Phys. A49, 354001 (2016), arXiv:1601.07185 [cond-mat.stat-mech]

  14. [14]

    Aasen, P

    D. Aasen, P. Fendley, and R. S. K. Mong, Topological De- fects on the Lattice: Dualities and Degeneracies (2020), arXiv:2008.08598 [cond-mat.stat-mech]

  15. [15]

    Chang, Y.-H

    C.-M. Chang, Y.-H. Lin, S.-H. Shao, Y. Wang, and X. Yin, Topological Defect Lines and Renormaliza- tion Group Flows in Two Dimensions, JHEP01, 026, arXiv:1802.04445 [hep-th]

  16. [16]

    Schafer-Nameki, ICTP lectures on (non-)invertible generalized symmetries, Phys

    S. Schafer-Nameki, ICTP lectures on (non-)invertible generalized symmetries, Phys. Rept.1063, 1 (2024), arXiv:2305.18296 [hep-th]

  17. [17]

    S.-H. Shao, What’s Done Cannot Be Undone: TASI Lec- tures on Non-Invertible Symmetries, inTheoretical Ad- vanced Study Institute in Elementary Particle Physics 2023: Aspects of Symmetry(2023) arXiv:2308.00747 [hep-th]

  18. [18]

    Etingof, S

    P. Etingof, S. Gelaki, D. Nikshych, and V. Ostrik,Ten- sor categories, Mathematical Surveys and Monographs, Vol. 205 (American Mathematical Society, Providence, RI, 2015) pp. xvi+343

  19. [19]

    Komargodski, K

    Z. Komargodski, K. Ohmori, K. Roumpedakis, and S. Seifnashri, Symmetries and strings of adjoint QCD 2, JHEP03, 103, arXiv:2008.07567 [hep-th]

  20. [20]

    Bhardwaj, L

    L. Bhardwaj, L. E. Bottini, D. Pajer, and S. Schafer- Nameki, Categorical Landau Paradigm for Gapped Phases, Phys. Rev. Lett.133, 161601 (2024), arXiv:2310.03786 [cond-mat.str-el]

  21. [21]

    Chen, Essay: Generalized Landau Paradigm for Quan- tum Phases and Phase Transitions, Phys

    X. Chen, Essay: Generalized Landau Paradigm for Quan- tum Phases and Phase Transitions, Phys. Rev. Lett.135, 250001 (2025), arXiv:2511.19793 [hep-th]

  22. [22]

    E. H. Lieb and F. Y. Wu, Two dimensional ferroelectric models, inPhase Transitions and Critical Phenomena, Vol. 1, edited by C. Domb and M. S. Green (Academic Press, London, 1972) pp. 321–490

  23. [23]

    Lusztig, Modular representations and quantum groups, inClassical groups and related topics (Beijing, 1987), Contemp

    G. Lusztig, Modular representations and quantum groups, inClassical groups and related topics (Beijing, 1987), Contemp. Math., Vol. 82 (Amer. Math. Soc., Providence, RI, 1989) pp. 59–77

  24. [24]

    De Concini and V

    C. De Concini and V. G. Kac, Representations of quan- tum groups at roots of 1, inOperator algebras, unitary representations, enveloping algebras, and invariant the- ory (Paris, 1989), Progr. Math., Vol. 92 (Birkh¨ auser Boston, Boston, MA, 1990) pp. 471–506

  25. [25]

    Fabricius and B

    K. Fabricius and B. M. McCoy, Bethe’s Equation Is In- complete for the XXZ Model at Roots of Unity, J. Stat. Phys.103, 647 (2001)

  26. [26]

    Fabricius and B

    K. Fabricius and B. M. McCoy, Completing Bethe’s Equations at Roots of Unity, J. Stat. Phys.104, 573 (2001)

  27. [27]

    R. J. Baxter, Completeness of the Bethe ansatz for the six and eight-vertex models, J. Stat. Phys.108, 1 (2002)

  28. [28]

    Y. Miao, J. Lamers, and V. Pasquier, On the Q operator and the spectrum of the XXZ model at root of unity, SciPost Phys.11, 067 (2021), arXiv:2012.10224 [cond- mat.stat-mech]

  29. [29]

    Onsager, Crystal Statistics

    L. Onsager, Crystal Statistics. I. A Two-Dimensional Model with an Order-Disorder Transition, Phys. Rev.65, 117 (1944)

  30. [30]

    Davies, Onsager’s algebra and superintegrability, J

    B. Davies, Onsager’s algebra and superintegrability, J. Phys. A23, 2245–2261 (1990)

  31. [31]

    O’Dea, F

    N. O’Dea, F. Burnell, A. Chandran, and V. Khemani, From tunnels to towers: Quantum scars from lie algebras and q-deformed lie algebras, Physical Review Research2, 043305 (2020)

  32. [32]

    Shibata, N

    N. Shibata, N. Yoshioka, and H. Katsura, Onsager’s scars in disordered spin chains, Physical Review Letters124, 180604 (2020)

  33. [33]

    Jones, A

    N. Jones, A. Prakash, and P. Fendley, Pivoting through the chiral-clock family, SciPost Physics18, 094 (2025)

  34. [34]

    Deguchi, K

    T. Deguchi, K. Fabricius, and B. M. McCoy, Thesl2 Loop Algebra Symmetry of the Six-Vertex Model at Roots of Unity, J. Stat. Phys.102, 701 (2001)

  35. [35]

    Korff, The twisted XXZ chain at roots of unity revis- ited, J

    C. Korff, The twisted XXZ chain at roots of unity revis- ited, J. Phys. A37, 1681–1689 (2004)

  36. [36]

    Deguchi, Regular XXZ bethe states at roots of unity as highest weight vectors of thesl 2 loop algebra, J

    T. Deguchi, Regular XXZ bethe states at roots of unity as highest weight vectors of thesl 2 loop algebra, J. Phys. A40, 7473 (2007)

  37. [37]

    Vernier, E

    E. Vernier, E. O’Brien, and P. Fendley, Onsager symme- tries inU(1)-invariant clock models, J. Stat. Mech.1904, 043107 (2019), arXiv:1812.09091 [cond-mat.stat-mech]

  38. [38]

    Miao, Conjectures on Hidden Onsager Algebra Sym- metries in Interacting Quantum Lattice Models, SciPost Phys.11, 066 (2021), arXiv:2103.14569 [cond-mat.stat- mech]

    Y. Miao, Conjectures on Hidden Onsager Algebra Sym- metries in Interacting Quantum Lattice Models, SciPost Phys.11, 066 (2021), arXiv:2103.14569 [cond-mat.stat- mech]

  39. [39]

    However, The L(sl 2) generators in [33–35] only act on a sector of the entire Hilbert space of the spin chain

    We remark that asl 2 loop algebra symmetry of XXZ spin chain at root of unity was proposed by [33, 35]. However, The L(sl 2) generators in [33–35] only act on a sector of the entire Hilbert space of the spin chain. On the con- trary, the Onsager generators in our paper act on the entire Hilbert space, and commute with the Hamiltonian over the entire Hilbe...

  40. [40]

    H. A. Kramers and G. H. Wannier, Statistics of the Two- Dimensional Ferromagnet. Part I, Phys. Rev.60, 252 (1941)

  41. [41]

    H. A. Kramers and G. H. Wannier, Statistics of the Two- Dimensional Ferromagnet. Part II, Phys. Rev.60, 263 (1941)

  42. [42]

    Lootens, C

    L. Lootens, C. Delcamp, G. Ortiz, and F. Verstraete, Dualities in One-Dimensional Quantum Lattice Mod- els: Symmetric Hamiltonians and Matrix Product Op- erator Intertwiners, PRX Quantum4, 020357 (2023), arXiv:2112.09091 [quant-ph]

  43. [43]

    Lootens, C

    L. Lootens, C. Delcamp, and F. Verstraete, Dual- ities in One-Dimensional Quantum Lattice Models: Topological Sectors, PRX Quantum5, 010338 (2024), arXiv:2211.03777 [quant-ph]

  44. [44]

    L. Li, M. Oshikawa, and Y. Zheng, Noninvertible duality transformation between symmetry-protected topological 7 and spontaneous symmetry breaking phases, Phys. Rev. B108, 214429 (2023), arXiv:2301.07899 [cond-mat.str- el]

  45. [45]

    W. Cao, L. Li, M. Yamazaki, and Y. Zheng, Subsystem non-invertible symmetry operators and defects, SciPost Phys.15, 155 (2023), arXiv:2304.09886 [cond-mat.str-el]

  46. [46]

    Seiberg and S.-H

    N. Seiberg and S.-H. Shao, Majorana chain and Ising model - (non-invertible) translations, anomalies, and emanant symmetries, SciPost Phys.16, 064 (2024), arXiv:2307.02534 [cond-mat.str-el]

  47. [47]

    Compared to the superintegrability in models with Yangian symmetry, such as the Calogero–Sutherland model [79], the non-Abelian conserved charges of the XXZ spin chain at roots of unity arelocalorquasilocal

  48. [48]

    E. Date, M. Jimbo, K. Miki, and T. Miwa, NewRMatri- ces Associated with Cyclic Representations ofU q(A(2) 2 ), Publ. Res. Inst. Math. Sci.27, 639–655 (1991)

  49. [49]

    V. V. Bazhanov and Y. G. Stroganov, Chiral Potts model as a descendant of the six vertex model, J. Stat. Phys. 59, 799 (1990)

  50. [50]

    Au-Yang, B

    H. Au-Yang, B. M. McCoy, J. H. H. Perk, S. Tang, and M.-L. Yan, Commuting Transfer Matrices in the Chiral Potts Models: Solutions of Star Triangle Equations with Genus>1, Phys. Lett. A123, 219 (1987)

  51. [51]

    R. J. Baxter, J. H. H. Perk, and H. Au-Yang, New Solu- tions of the Star Triangle Relations for the Chiral Potts Model, Phys. Lett. A128, 138 (1988)

  52. [52]

    R. J. Baxter, V. V. Bazhanov, and J. H. H. Perk, Func- tional relations for transfer matrices of the chiral Potts model, Int. J. Mod. Phys. B4, 803 (1990)

  53. [53]

    Roan, On the tau(2)-model in the chiral potts model and cyclic representation of the quantum group uq(sl2), Journal of Physics A: Mathematical and Theoretical42, 072003 (2009)

    S.-s. Roan, On the tau(2)-model in the chiral potts model and cyclic representation of the quantum group uq(sl2), Journal of Physics A: Mathematical and Theoretical42, 072003 (2009)

  54. [54]

    Weston, Cyclic Representations ofU q(ˆsl2) and its Borel Subalgebras at Roots of Unity and Q-operators, SciPost Phys

    R. Weston, Cyclic Representations ofU q(ˆsl2) and its Borel Subalgebras at Roots of Unity and Q-operators, SciPost Phys. Core9, 016 (2026), arXiv:2412.14811 [math-ph]

  55. [55]

    Dolan and M

    L. Dolan and M. Grady, Conserved charges from self- duality, Phys. Rev. D25, 1587 (1982)

  56. [56]

    Tambara and S

    D. Tambara and S. Yamagami, Tensor Categories with Fusion Rules of Self-Duality for Finite Abelian Groups, J. Algebra209, 692 (1998)

  57. [57]

    S. D. Pace, A. Chatterjee, and S.-H. Shao, Lattice T- duality from non-invertible symmetries in quantum spin chains, SciPost Phys.18, 121 (2025), arXiv:2412.18606 [cond-mat.str-el]

  58. [58]

    Thorngren and Y

    R. Thorngren and Y. Wang, Fusion category symmetry. Part II. Categoriosities at c = 1 and beyond, JHEP07, 051, arXiv:2106.12577 [hep-th]

  59. [59]

    P. H. Ginsparg, Applied Conformal Field Theory, in Les Houches Summer School in Theoretical Physics: Fields, Strings, Critical Phenomena(1988) arXiv:hep- th/9108028

  60. [60]

    This connection appears unrelated to the appearance of theq-Onsager algebra in open XXZ chains [80]

  61. [61]

    Pasquier and H

    V. Pasquier and H. Saleur, Common Structures Between Finite Systems and Conformal Field Theories Through Quantum Groups, Nucl. Phys. B330, 523 (1990)

  62. [62]

    A. M. Gainutdinov, W. Hao, R. I. Nepomechie, and A. J. Sommese, Counting solutions of the Bethe equations of the quantum group invariant open XXZ chain at roots of unity, J. Phys. A48, 494003 (2015), arXiv:1505.02104 [math-ph]

  63. [63]

    A. M. Gainutdinov and R. I. Nepomechie, Algebraic Bethe ansatz for the quantum group invariant open XXZ chain at roots of unity, Nucl. Phys. B909, 796 (2016), arXiv:1603.09249 [math-ph]

  64. [64]

    Pinet and Y

    T. Pinet and Y. Saint-Aubin, Spin Chains as Mod- ules over the Affine Temperley–Lieb Algebra, Algebr. Represent. Theory26, 2523 (2023), arXiv:2205.02649 [math.RT]

  65. [65]

    Y. Hu, F. Gerken, and T. Posske, Hidden Twisted Sectors and Exponential Degeneracy in Root-of-Unity XXZ Heisenberg Chains (2026), arXiv:2602.15098 [cond- mat.stat-mech]

  66. [66]

    J. G. Rubio and I. Kull, Gauging quantum states with nonanomalous matrix product operator symme- tries, Phys. Rev. B107, 075137 (2023), arXiv:2209.07355 [quant-ph]

  67. [67]

    Reshetikhin and V

    N. Reshetikhin and V. G. Turaev, Invariants of 3- manifolds via link polynomials and quantum groups, In- vent. Math.103, 547 (1991)

  68. [68]

    Witten, Quantum Field Theory and the Jones Poly- nomial, Commun

    E. Witten, Quantum Field Theory and the Jones Poly- nomial, Commun. Math. Phys.121, 351 (1989)

  69. [69]

    Yamazaki, New T-duality for Chern-Simons Theory, JHEP12, 090, arXiv:1904.04976 [hep-th]

    M. Yamazaki, New T-duality for Chern-Simons Theory, JHEP12, 090, arXiv:1904.04976 [hep-th]

  70. [70]

    Costello, E

    K. Costello, E. Witten, and M. Yamazaki, Gauge The- ory and Integrability, I, ICCM Not.06, 46 (2018), arXiv:1709.09993 [hep-th]

  71. [71]

    Costello, E

    K. Costello, E. Witten, and M. Yamazaki, Gauge The- ory and Integrability, II, ICCM Not.06, 120 (2018), arXiv:1802.01579 [hep-th]

  72. [72]

    Costello and M

    K. Costello and M. Yamazaki, Gauge Theory And Inte- grability, III (2019), arXiv:1908.02289 [hep-th]

  73. [73]

    S. F. Moosavian, M. Yamazaki, and Y. Zhou, Hy- perbolic Monopoles, (Semi-)Holomorphic Chern-Simons Theories, and Generalized Chiral Potts Models (2025), arXiv:2502.17545 [hep-th]

  74. [74]

    M. F. Atiyah and M. K. Murray, Monopoles and Yang– Baxter Equations, inFurther Advances in Twistor The- ory: Integrable Systems, Conformal Geometry and Grav- itation, Monographs and Surveys in Pure and Applied Mathematics, Vol. II, edited by L. J. Mason, L. P. Hugh- ston, and P. Z. Kobak (CRC Press, 1995) 1st ed., pp. 13–14

  75. [75]

    Costello,Topological Strings, Twistors, and Skyrmions, Talk at the Western Hemisphere Collo- quium on Geometry and Physics (2020)

    K. Costello,Topological Strings, Twistors, and Skyrmions, Talk at the Western Hemisphere Collo- quium on Geometry and Physics (2020)

  76. [76]

    Bittleston and D

    R. Bittleston and D. Skinner, Twistors, the ASD Yang– Mills Equations and 4d Chern–Simons Theory, J. High Energy Phys.02, 227, arXiv:2011.04638 [hep-th]

  77. [77]

    Costello and J

    K. Costello and J. Yagi, Unification of Integrability in Su- persymmetric Gauge Theories, Adv. Theor. Math. Phys. 24, 1931 (2020), arXiv:1810.01970 [hep-th]

  78. [78]

    Ashwinkumar, M.-C

    M. Ashwinkumar, M.-C. Tan, and Q. Zhao, Branes and Categorifying Integrable Lattice Models, Adv. Theor. Math. Phys.24, 1 (2020), arXiv:1806.02821 [hep-th]

  79. [79]

    El-Chaar, The Onsager Algebra (2012), arXiv:1205.5989 [math.RA]

    C. El-Chaar, The Onsager Algebra (2012), arXiv:1205.5989 [math.RA]

  80. [80]

    Isachenkov and V

    M. Isachenkov and V. Schomerus, Superintegrability of d-dimensional Conformal Blocks, Phys. Rev. Lett.117, 071602 (2016), arXiv:1602.01858 [hep-th]

Showing first 80 references.