OAI/Algebra/Finitistic/Main.lean
6 declarations, 0 contain sorry, 0 declared as axioms
- theorem
OAI.LittleFinitistic.Main.algebra_finiteline 12Source documentation
The fixed algebra and every actual witness are finite dimensional over ℂ.
theorem algebra_finite : FiniteDimensional ℂ A := inferInstance
- theorem
OAI.LittleFinitistic.Main.test_finiteline 14 - theorem
OAI.LittleFinitistic.Main.projective_dimension_boundsline 19Source 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 … - theorem
OAI.LittleFinitistic.Main.infinite_littleFinitisticDimensionline 27Source documentation
The actual constructed algebra has infinite little finitistic dimension.
theorem infinite_littleFinitisticDimension : littleFinitisticDimension A = ⊤ := by …
- theorem
OAI.LittleFinitistic.Main.counterexampleline 36Source 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 … - theorem
OAI.LittleFinitistic.Main.exists_counterexampleline 44Distinct definitions of this name: ComparatorChallenges/LittleFinitistic.lean:23 (same statement text; different proof or body). Qualify references as OAI.LittleFinitistic.Main.exists_counterexample@path.