[ add ] Pointwise lifting of algebra to Data.Vec.Functional (Functional vector module #1945 redux)

CHANGELOG.md

@@ -48,6 +48,8 @@ New modules
 
 * `Data.List.Relation.Binary.Permutation.Declarative{.Properties}` for the least congruence on `List` making `_++_` commutative, and its equivalence with the `Setoid` definition.
 
+* `Data.Vec.Functional.Algebra(.{Base|Properties})` - structures and bundles about functional vectors and modules.
+
 Additions to existing modules
 -----------------------------
 

src/Data/Vec/Functional/Algebra/Base.agda

@@ -0,0 +1,127 @@
+------------------------------------------------------------------------
+-- The Agda standard library
+--
+-- Some VecF.Vector-related module Definitions
+------------------------------------------------------------------------
+
+{-# OPTIONS --cubical-compatible --safe #-}
+
+module Data.Vec.Functional.Algebra.Base where
+
+open import Level using (Level; suc; _⊔_)
+open import Function using (_$_)
+open import Data.Nat using (ℕ)
+open import Data.Fin using (Fin)
+import Data.Vec.Functional as VecF
+open import Algebra.Core
+open import Algebra.Bundles
+open import Algebra.Module
+open import Relation.Binary using (Rel)
+import Data.Vec.Functional.Relation.Binary.Pointwise as Pointwise
+
+private variable
+  a ℓ : Level
+  A : Set a
+  n : ℕ
+
+------------------------------------------------------------------------
+-- VecF.Vector-lifted raw structures
+
+rawMagma : RawMagma a ℓ → (n : ℕ) → RawMagma a ℓ
+rawMagma M n =
+  record
+    { Carrier = VecF.Vector M.Carrier n
+    ; _≈_     = Pointwise.Pointwise M._≈_
+    ; _∙_     = VecF.zipWith M._∙_
+    }
+  where module M = RawMagma M
+
+rawMonoid : RawMonoid a ℓ → (n : ℕ) → RawMonoid a ℓ
+rawMonoid M n =
+  record
+    { RawMagma (rawMagma M.rawMagma n)
+    ; ε = λ _ → M.ε
+    }
+  where module M = RawMonoid M
+
+rawGroup : RawGroup a ℓ → (n : ℕ) → RawGroup a ℓ
+rawGroup G n =
+  record
+    { RawMonoid (rawMonoid G.rawMonoid n)
+    ; _⁻¹ = VecF.map G._⁻¹
+    }
+  where module G = RawGroup G
+
+rawNearSemiring : RawNearSemiring a ℓ → (n : ℕ) → RawNearSemiring a ℓ
+rawNearSemiring NS n =
+  record
+    { Carrier = VecF.Vector NS.Carrier n
+    ; _≈_     = Pointwise.Pointwise NS._≈_
+    ; _+_     = VecF.zipWith NS._+_
+    ; _*_     = VecF.zipWith NS._*_
+    ; 0#      = λ _ → NS.0#
+    }
+  where module NS = RawNearSemiring NS
+
+rawSemiring : RawSemiring a ℓ → (n : ℕ) → RawSemiring a ℓ
+rawSemiring S n =
+  record
+    { RawNearSemiring (rawNearSemiring S.rawNearSemiring n)
+    ; 1# = λ _ → S.1#
+    }
+  where module S = RawSemiring S
+
+rawRing : RawRing a ℓ → (n : ℕ) → RawRing a ℓ
+rawRing R n =
+  record
+    { RawSemiring (rawSemiring R.rawSemiring n)
+    ; -_ = VecF.map R.-_
+    }
+  where module R = RawRing R
+
+------------------------------------------------------------------------
+-- VecF.Vector actions (left/right scalar multiplication)
+
+_*ₗ_ : {S : Set a} → Op₂ S → Opₗ S (VecF.Vector S n)
+_*ₗ_ _*_ r xs = VecF.map (r *_) xs
+
+_*ᵣ_ : {S : Set a} → Op₂ S → Opᵣ S (VecF.Vector S n)
+_*ᵣ_ _*_ xs r = VecF.map (_* r) xs
+
+------------------------------------------------------------------------
+-- VecF.Vector-lifted semimodule bundles
+
+rawLeftSemimodule : (NS : RawNearSemiring a ℓ) (n : ℕ) → RawLeftSemimodule (RawNearSemiring.Carrier NS) a ℓ
+rawLeftSemimodule NS n =
+  record
+    { Carrierᴹ = VecF.Vector NS.Carrier n
+    ; _≈ᴹ_     = Pointwise.Pointwise NS._≈_
+    ; _+ᴹ_     = VecF.zipWith NS._+_
+    ; _*ₗ_     = _*ₗ_ NS._*_
+    ; 0ᴹ       = λ _ → NS.0#
+    }
+  where module NS = RawNearSemiring NS
+
+rawRightSemimodule : (NS : RawNearSemiring a ℓ) (n : ℕ) → RawRightSemimodule (RawNearSemiring.Carrier NS) a ℓ
+rawRightSemimodule NS n =
+  record
+    { Carrierᴹ = VecF.Vector NS.Carrier n
+    ; _≈ᴹ_     = Pointwise.Pointwise NS._≈_
+    ; _+ᴹ_     = VecF.zipWith NS._+_
+    ; _*ᵣ_     = _*ᵣ_ NS._*_
+    ; 0ᴹ       = λ _ → NS.0#
+    }
+  where module NS = RawNearSemiring NS
+
+rawBisemimodule : (NS : RawNearSemiring a ℓ) (n : ℕ) → RawBisemimodule (RawNearSemiring.Carrier NS)
+                   (RawNearSemiring.Carrier NS) a ℓ
+rawBisemimodule NS n =
+  record
+    { Carrierᴹ = VecF.Vector NS.Carrier n
+    ; _≈ᴹ_     = Pointwise.Pointwise NS._≈_
+    ; _+ᴹ_     = VecF.zipWith NS._+_
+    ; _*ₗ_     = _*ₗ_ NS._*_
+    ; _*ᵣ_     = _*ᵣ_ NS._*_
+    ; 0ᴹ       = λ _ → NS.0#
+    }
+  where module NS = RawNearSemiring NS