Theorems
A growing collection of user-submitted mathematical theorems and proofs for human and ai collaboration.
The Asymptotically Optimal Value of the Recentred N-Agent Cost of the Ising Population Model
corollarycor:ising-asymptotic-value-2026aAnalysisProbabilityThe Ising population model satisfies every standing hypothesis of the fluctuation optimality theorem at its even-split equilibrium, so the asymptotically optimal value of its recentred N-agent cost is the explicit integral of the two scalar Riccati solutions.The Control and Filter Riccati Families of the Ising Equilibrium in Closed Form
lemmalem:ising-riccati-families-2026aAnalysisProbabilityBoth Riccati families of the Ising equilibrium reduce to scalar equations along the tangential direction and are solved in closed form; this verifies the Riccati hypothesis of the completion-of-squares theorem and identifies the Kalman covariance and the two integrands of the flu…The Fluctuation LQG Data of the Ising Equilibrium and Its Joint Coercivity
lemmalem:ising-fluctuation-lqg-data-2026aProbabilityLinear AlgebraComputes every matrix of the fluctuation linear-quadratic-Gaussian data at the even-split equilibrium of the Ising model in closed form, and shows that the fluctuation Hessian is positive definite with an explicit coercivity constant.The Even-Split Equilibrium of the Ising Population Model is a Stationary Mean-Field Triple and is Optimal
lemmalem:ising-stationary-triple-2026aAnalysisProbabilityThe constant triple with an even population split, unit transition rates and vanishing co-state is a stationary mean-field triple whose control is the unique Hamiltonian minimiser and is globally optimal for the mean-field problem, and the first-order to-go regularity hypothesis…The Ising Population Model Instantiates the Data of the Fluctuation Theory
lemmalem:ising-data-well-posed-2026aAnalysisProbabilityThe Ising rates, observation rates and costs form an affine-controlled transition-rate family, an observation-rate family and population cost data with the stated smooth extensions, and satisfy the compactness, uniform observation positivity and Lipschitz cost hypotheses of the f…- Constructs a globally , convex, nonnegative function on the real line that coincides with the entropic rate cost near the rest rate 1, vanishes only there, and has bounded, Lipschitz first and second derivatives.
Asymptotically Optimal Value of a Set of Real Sequences
definitiondef:asymptotically-optimal-value-sequences-2026aAnalysisLet be a nonempty set of sequences of real numbers, indexed by the natural numbers , and let be a real number. We say that is an asymptotically optimal value of if (i) for every sequence in…Joint Measurability of the Tracked Events and of the Tracked Energy Density over the Block Cascade, and Measurability in Time of Their Expectations
lemmalem:tracked-energy-density-measurable-2026aAnalysisProbabilitySetting. Adopt the setting, notation, parameters and standing hypotheses of Ledger Decomposition of the Recentred N-Agent Cost over the Block Cascade and Its Near-Field Filtering Lower Bound, formed for one and the same data as there. In particular: the natural numbers ,…The Fluctuation LQG Value Is the Asymptotically Optimal Value of the Recentred N-Agent Cost over Admissible Families of Observation-Driven Policies, and Is Attained by the Approximate Kalman Policies, under Deterministic Initial States
theoremthm:lqg-value-is-asymptotically-optimal-2026aAnalysisProbabilityCommon data. Adopt the common data and the standing hypotheses of Asymptotic Lower Bound for the Recentred N-Agent Cost without Uniform Control-Moment Hypotheses, and the notation of…Injection Certificates on the Trimmed Synthetic Copy for the Family of N-Agent Solutions: the Law-Transported Van Trees Certificate Hypothesis Holds under Deterministic Initial States, Uniform Observation Positivity and a Observation Extension
lemmalem:van-trees-certificates-from-n-agent-solutions-2026aProbabilitySetting. Adopt the setting, notation and standing hypotheses of…Instantiation of the Trimmed-Copy Van Trees Data from an N-Agent Solution at the Power Scales: Construction of the Copy Side, Verification of the Copy Hypotheses, and Domination of Its Constants by the Scale-Set Majorants
lemmalem:van-trees-assembly-copy-instantiation-2026aProbabilityThe -agent side and the intermediate time. Adopt the two paragraphs The -agent side and The intermediate time of the setting of…Mean-Field-Side Data for the Van Trees Assembly: Regularity of the Drift Jacobian and Fluctuation Covariance Along a Trajectory Pair, the Fundamental-Solution Bound, the Profile Response and Its Restriction, and the Observation Information Matrix of the Fluctuation LQG Data
lemmalem:van-trees-assembly-mean-field-data-2026aAnalysisData. Let , and be natural numbers, let be a nonempty subset of Euclidean space, let be a transition-rate family on states with control set and rate bound , let …The Scale Set for the Van Trees Assembly: Eventual Validity of the Copy-Side Constraints, Lower Bounds for the Chernoff Exponents, and Vanishing of the Error Majorants
lemmalem:van-trees-assembly-scale-set-2026aAnalysisData. Let , and be natural numbers, and let , , , , , , , , , , , , ,…- Let be the real numbers, let be the exponential function and let be the natural logarithm. For a real number and a real number , the real power of with exponent is
Real Powers Through the Exponential, and Elementary Asymptotic Tools: Monotonicity, Null Sequences of Negative Powers, Exponential Domination, Integer Rounding, and Square-Root and Exponential Inequalities
lemmalem:real-powers-asymptotic-tools-2026aAnalysisSetting. Let be the real numbers, an ordered field with order ; for write for the associated strict order ( and ), for the absolute value, and ( a natural number) for the natural number power. Let…The Van Trees Data of the Trimmed Synthetic Copy Supplied by an N-Agent Solution: Transport to the Record Support, Regularity of the Smoothed Joint Density, the Information Bound in the Injection Direction, and the Pairing of the Cell Coefficients with the Profile Response
lemmalem:copy-van-trees-data-from-n-agent-solution-2026aProbabilitySetting. Adopt the setting, notation, hypothesis (L) and conventions of…The Closeness, Fourth-Moment and Discrepancy Hypotheses of the Estimand Assembly Lemma Supplied by an N-Agent Solution under the Cost Bound: Control-Lipschitz Bound on the Record Discrepancy, Close Records from the Path-Closeness Event, and the Explicit Mean-Square Bound
lemmalem:copy-estimand-assembly-hypotheses-from-n-agent-solution-2026aProbabilityThe -agent side. Adopt the setting, notation and standing hypotheses of…The Observation-Centred Fluctuation at an Intermediate Time: Restriction of the Mean-Field Flow and of the Realized Control to a Shorter Horizon, Representation through the Aggregate State and the Record Prefix, and Transport of Its Joint Law with the Record to the Synthetic Copy
lemmalem:observation-centred-fluctuation-copy-transport-2026aProbabilityData. Adopt the Data paragraph of The Realized Control as the Record-Frozen Control at the Observation Record, and Measurability of the Path-and-Record Closeness Set (its comparison data and its path data are not used here): natural numbers , , and…Moment Toolkit for the Synthetic Copy: Square-Integrable Majorants of the Window Discrepancies of the Copy Clocks and the Fourth Moment of a Weighted Centred Cell-Count Sum
lemmalem:copy-clock-discrepancy-cell-count-moments-2026aProbabilityAdopt the setting and notation of The Synthetic Copy: Independent Cell Structure, Deterministic-Count Clocks, the Copy Measure, and the Smoothed Joint Density of Parameter and Observation Record (as also adopted by…Mean-Square Assembly of the Estimand Linearisation on the Synthetic Copy: Approximation of the Recentred Copy Endpoint by an Affine Function of the Parameter
lemmalem:copy-estimand-mean-square-assembly-2026bAnalysisProbabilityAdopt the setting, hypotheses (OC), (X), (W), (G), (G), (CL) and notation of Information Bound on the Synthetic Copy with Mean-Field Data: Prior Energy of the Profile, Observation Information Along the Profile Response, and the Non-Close Record Mass (and hence of…