Integrable Systems Reference
Find precise definitions, conventions, formulas, and results. The reference is organized for focused lookup, with assumptions and regimes kept beside the statements that depend on them.
A concise formula is useful only with its definitions and conditions. Begin with Definitions of integrability compared to distinguish classical hypotheses, quantum constructions, exact stochastic observables and numerical evidence. The other available references state the Liouville–Arnold hypotheses for invariant tori, explain Lax equations, distinguish solitary waves from solitons, translate spin-chain, R-matrix and KdV conventions, fix Markov generators and stochastic current definitions, and collect checked source editions with BibTeX downloads. Each links back to the relevant explanations and model definitions.
The chapter map also identifies future lookup material. Plain-text titles are planned entries, not available formulas or results.
Learning sequences: Open Toda · The XXX spin chain · KdV solitons · Finite-ring TASEP
Available readings
Chapter map
Readings and planned coverage
CHAPTER 01
Terms & Notation
Planned coverage
- Glossary A–Z
- Symbols by context
- Abbreviations, aliases & spellings
- Subject & object index
CHAPTER 02
Conventions & Dictionaries
- R-matrix and transfer-matrix conventions
- Spin-chain Hamiltonian conventions
- Nonlinear-wave equation conventions
- Markov generators and stochastic conventions
Planned coverage
- Hamiltonian & Poisson conventions
- Fourier, convolution & distribution conventions
- Units, rescalings & dimensionless parameters
- Lax, monodromy & zero-curvature conventions
- Spectral parameters, rapidities & branches
- Bethe phases & state normalization
- Root densities, fillings & dressing conventions
- Periods, cycles, elliptic & theta conventions
- Monodromy, Stokes & tau-function conventions
CHAPTER 03
Equations & Identities
Planned coverage
- Equation & identity index
- Hamiltonian & Poisson identities
- Scattering & reconstruction relations
- Yang–Baxter, RTT & reflection relations
- Bethe, Baxter & fusion relations
- Hirota bilinear & tau-function identities
- Determinant, Pfaffian & Fredholm identities
- S-matrix & form-factor relations
- Thermodynamic & dressing equations
- Hydrodynamic & continuity equations
- Spectral curves & period relations
- Monodromy & isomonodromic equations
- Elliptic, theta & special-function identities
CHAPTER 04
Theorems & Criteria
Planned coverage
- Theorem & criterion index
- Hamilton–Jacobi & Stäckel criteria
- Lax & classical r-matrix criteria
- Commuting transfer-matrix criteria
- Bi-Hamiltonian & recursion criteria
- Conserved charges & factorized-scattering criteria
- Multidimensional consistency criteria
- KAM theorem: hypotheses & limits
- Differential-Galois obstructions
- Integrability diagnostics & their limits
CHAPTER 05
Regimes & Observables
Planned coverage
- Boundary conditions, sectors & domains
- Limits, scaling & order of limits
- Approximations & breakdown conditions
- Charges, densities & quasiparticles
- Spectra, gaps & finite-size quantities
- Correlations, response & spectral functions
- Transport coefficients & counting statistics
- Entanglement & information quantities
- Soliton, scattering & wave observables
- Probability laws & stochastic observables
- Geometric, monodromy & period data
CHAPTER 06
Methods & Correspondences
Planned coverage
- Method finder
- Spectral & scattering methods compared
- Bethe & functional-equation methods compared
- Transformations & separation methods compared
- Asymptotic & numerical methods compared
- Classical–quantum & lattice–continuum dictionaries
- Statistical–quantum & stochastic dictionaries
- ODE/IM & isomonodromic dictionaries
- Gauge-theory & geometric dictionaries
CHAPTER 07
Software, Notebooks & Data
Planned coverage
- Software catalog
- Notebooks & executable examples
- Reference datasets & numerical tables
- Benchmark specifications & test cases
- Reproducible environments & run manifests
- Numerical precision & error reporting
- Artifact versions, provenance & citation
CHAPTER 08
Bibliography & Sources
Planned coverage
- Books & monographs
- Reviews & lecture notes
- Original papers & result locators
- Theses, courses & recorded lectures
- Source concordances & edition differences
- Errata, translations & version histories
CHAPTER 09
History & Common Confusions
Planned coverage
- Historical timeline
- Terminology & attribution history
- Integrable, exactly solvable & free
- Conservation, completeness & locality
- Spectral data versus physical observables
- Limits, diagnostics & equivalence pitfalls