Alphabeta Math

Contextual expert bandits

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How statement and proof provenance work

The first chip identifies the source of the statement or construction; the second identifies the source of its local proof or verification.

  • Literature-sourced: the exact statement appears in a cited source; only wording and notation differ.
  • AI-adapted: a semantically identical restatement of literature-sourced material, modulo indexing, notation, and boundary cases adopted by the library.
  • AI-generated: a genuinely novel statement formulated by AI, with no source for the claim itself.

These labels describe origin, not correctness: citations and verification chips remain separate evidence.

1 · Prerequisites
Abstract Algebra
Combinatorics
Linear Algebra
Machine Learning Algorithms
Measure Theory
Numerical Linear Algebra and Approximation
Probability
Real Analysis
Set Theory
Topology
2 · Logical flowchart

3 · Items

Definition

Contextual bandit protocol with finite expert advice

Algorithm

Exp4 with unbiased estimated rewards

Lemma

Exp4 updates are well-defined, including zero-probability actions

Lemma

Exp4 expert reward estimates are conditionally unbiased

Lemma

Exp4 weighted estimated loss has conditional second moment at most k

Lemma

Exp4 exponential-weights potential inequality

Theorem

Exp4 expected regret against the best fixed expert

Sources