diff --git a/HepLean.lean b/HepLean.lean
index ee22052..5cbd5d9 100644
--- a/HepLean.lean
+++ b/HepLean.lean
@@ -1,6 +1,5 @@
 import HepLean.AnomalyCancellation.Basic
 import HepLean.AnomalyCancellation.GroupActions
-import HepLean.AnomalyCancellation.LinearMaps
 import HepLean.AnomalyCancellation.MSSMNu.B3
 import HepLean.AnomalyCancellation.MSSMNu.Basic
 import HepLean.AnomalyCancellation.MSSMNu.HyperCharge
@@ -59,7 +58,8 @@ import HepLean.FlavorPhysics.CKMMatrix.Relations
 import HepLean.FlavorPhysics.CKMMatrix.Rows
 import HepLean.FlavorPhysics.CKMMatrix.StandardParameterization.Basic
 import HepLean.FlavorPhysics.CKMMatrix.StandardParameterization.StandardParameters
-import HepLean.GroupTheory.SO3.Basic
+import HepLean.Mathematics.SO3.Basic
+import HepLean.Mathematics.LinearMaps
 import HepLean.SpaceTime.AsSelfAdjointMatrix
 import HepLean.SpaceTime.Basic
 import HepLean.SpaceTime.CliffordAlgebra
diff --git a/HepLean/AnomalyCancellation/Basic.lean b/HepLean/AnomalyCancellation/Basic.lean
index 9014d50..c44b98f 100644
--- a/HepLean/AnomalyCancellation/Basic.lean
+++ b/HepLean/AnomalyCancellation/Basic.lean
@@ -3,7 +3,7 @@ Copyright (c) 2024 Joseph Tooby-Smith. All rights reserved.
 Released under Apache 2.0 license.
 Authors: Joseph Tooby-Smith
 -/
-import HepLean.AnomalyCancellation.LinearMaps
+import HepLean.Mathematics.LinearMaps
 import Mathlib.Algebra.Module.Basic
 import Mathlib.LinearAlgebra.FiniteDimensional
 /-!
diff --git a/HepLean/AnomalyCancellation/LinearMaps.lean b/HepLean/Mathematics/LinearMaps.lean
similarity index 100%
rename from HepLean/AnomalyCancellation/LinearMaps.lean
rename to HepLean/Mathematics/LinearMaps.lean
diff --git a/HepLean/GroupTheory/SO3/Basic.lean b/HepLean/Mathematics/SO3/Basic.lean
similarity index 100%
rename from HepLean/GroupTheory/SO3/Basic.lean
rename to HepLean/Mathematics/SO3/Basic.lean
diff --git a/HepLean/SpaceTime/LorentzGroup/Rotations.lean b/HepLean/SpaceTime/LorentzGroup/Rotations.lean
index c4a861d..605d025 100644
--- a/HepLean/SpaceTime/LorentzGroup/Rotations.lean
+++ b/HepLean/SpaceTime/LorentzGroup/Rotations.lean
@@ -4,7 +4,7 @@ Released under Apache 2.0 license.
 Authors: Joseph Tooby-Smith
 -/
 import HepLean.SpaceTime.LorentzGroup.Basic
-import HepLean.GroupTheory.SO3.Basic
+import HepLean.Mathematics.SO3.Basic
 import Mathlib.Topology.Constructions
 /-!
 # Rotations