2 files changed, 19 insertions, 0 deletions

diff --git a/packages/base/src/Internal/Static.hs b/packages/base/src/Internal/Static.hs
index 381f3bc..9ed4710 100644
--- a/packages/base/src/Internal/Static.hs
+++ b/packages/base/src/Internal/Static.hs
@@ -518,6 +518,18 @@ instance (KnownNat n, KnownNat m) => Floating (M n m) where
     (**)  = lift2MD (**)
     pi    = M pi
 
+instance Additive (R n) where
+    add = (+)
+
+instance Additive (C n) where
+    add = (+)
+
+instance (KnownNat m, KnownNat n) => Additive (L m n) where
+    add = (+)
+
+instance (KnownNat m, KnownNat n) => Additive (M m n) where
+    add = (+)
+
 --------------------------------------------------------------------------------
 
 
diff --git a/packages/base/src/Numeric/LinearAlgebra/Static.hs b/packages/base/src/Numeric/LinearAlgebra/Static.hs
index a55ae44..2ffc531 100644
--- a/packages/base/src/Numeric/LinearAlgebra/Static.hs
+++ b/packages/base/src/Numeric/LinearAlgebra/Static.hs
@@ -821,3 +821,10 @@ instance KnownNat n => Floating (Sym n)
     sqrt  = mkSym sqrt
     (**)  = mkSym2 (**)
     pi    = Sym pi
+
+instance KnownNat n => Additive (Sym n) where
+    add = (+)
+
+instance KnownNat n => Transposable (Sym n) (Sym n) where
+    tr (Sym m) = Sym (tr m)
+    tr' = id