Bandits.UCB.regret_le.{u_1} {K : ℕ} {hK : 0 < K} {c : ℝ}
  {ν : ProbabilityTheory.Kernel (Fin K) ℝ}
  [ProbabilityTheory.IsMarkovKernel ν] {Ω : Type u_1}
  {mΩ : MeasurableSpace Ω} {P : MeasureTheory.Measure Ω}
  [MeasureTheory.IsProbabilityMeasure P] {A : ℕ → Ω → Fin K}
  {R : ℕ → Ω → ℝ} {σ2 : NNReal}
  (h :
    Learning.IsAlgEnvSeq A R (ucbAlgorithm hK (c * ↑σ2))
      (Learning.stationaryEnv ν) P)
  (hν :
    ∀ (a : Fin K),
      ProbabilityTheory.HasSubgaussianMGF
        (fun x => x - ∫ (x : ℝ), id x ∂ν a) σ2 (ν a))
  (hσ2 : σ2 ≠ 0) (hc : 0 < c) (n : ℕ) :
  ∫ (x : Ω), regret ν A n x ∂P ≤
    ∑ a,
      (8 * c * ↑σ2 * Real.log (↑n + 1) / gap ν a +
        gap ν a * (2 + 2 * ENNReal.toReal (constSum c n)))
Bandits.UCB.regret_le.{u_1} {K : ℕ}
  {hK : 0 < K} {c : ℝ}
  {ν : ProbabilityTheory.Kernel (Fin K) ℝ}
  [ProbabilityTheory.IsMarkovKernel ν]
  {Ω : Type u_1} {mΩ : MeasurableSpace Ω}
  {P : MeasureTheory.Measure Ω}
  [MeasureTheory.IsProbabilityMeasure P]
  {A : ℕ → Ω → Fin K} {R : ℕ → Ω → ℝ}
  {σ2 : NNReal}
  (h :
    Learning.IsAlgEnvSeq A R
      (ucbAlgorithm hK (c * ↑σ2))
      (Learning.stationaryEnv ν) P)
  (hν :
    ∀ (a : Fin K),
      ProbabilityTheory.HasSubgaussianMGF
        (fun x =>
          x - ∫ (x : ℝ), id x ∂ν a)
        σ2 (ν a))
  (hσ2 : σ2 ≠ 0) (hc : 0 < c) (n : ℕ) :
  ∫ (x : Ω), regret ν A n x ∂P ≤
    ∑ a,
      (8 * c * ↑σ2 * Real.log (↑n + 1) /
          gap ν a +
        gap ν a *
          (2 +
            2 *
              ENNReal.toReal
                (constSum c n)))