OAI/Algebra/Finitistic/Main.lean

GitHub source file

6 declarations, 0 contain sorry, 0 declared as axioms

  1. theorem OAI.LittleFinitistic.Main.algebra_finite line 12

    Source documentation

    The fixed algebra and every actual witness are finite dimensional over ℂ.

    theorem algebra_finite : FiniteDimensional ℂ A := inferInstance
  2. theorem OAI.LittleFinitistic.Main.test_finite line 14
  3. theorem OAI.LittleFinitistic.Main.projective_dimension_bounds line 19

    Source documentation

    For the one fixed finite-dimensional complex algebra constructed in the manuscript, every positive m has the actual finite module N_m with the stated finite projective-dimension bounds.

    theorem projective_dimension_bounds (m : ℕ) [NeZero m] :
        ((2*m-2 : ℕ) : WithBot ℕ∞) ≤ projectiveDimension (testModule m) ∧
          projectiveDimension (testModule m) < ⊤ := by
    …
  4. theorem OAI.LittleFinitistic.Main.infinite_littleFinitisticDimension line 27

    Source documentation

    The actual constructed algebra has infinite little finitistic dimension.

    theorem infinite_littleFinitisticDimension : littleFinitisticDimension A = ⊤ := by
    …
  5. theorem OAI.LittleFinitistic.Main.counterexample line 36

    Source documentation

    Main theorem, with finite dimensionality of the one fixed A explicit and with actual finitely generated witness modules for every positive m.

    theorem counterexample : FiniteDimensional ℂ A ∧ littleFinitisticDimension A = ⊤ ∧
        ∀ m : ℕ, 0 < m → ∃ N : ModuleCat.{0} A, Module.Finite A N ∧
          ((2*m-2 : ℕ) : WithBot ℕ∞) ≤ projectiveDimension N ∧ projectiveDimension N < ⊤ := by
    …
  6. theorem OAI.LittleFinitistic.Main.exists_counterexample line 44

    Distinct definitions of this name: ComparatorChallenges/LittleFinitistic.lean:23 (same statement text; different proof or body). Qualify references as OAI.LittleFinitistic.Main.exists_counterexample@path.