diff --git a/mat/diagonal.go b/mat/diagonal.go
index 37bac837..ebf5ee13 100644
--- a/mat/diagonal.go
+++ b/mat/diagonal.go
@@ -45,7 +45,7 @@ type Diagonal interface {
 	Bandwidth() (kl, ku int)
 	TBand() Banded
 
-	// Triangular and TTri are included in the Diagonal interface
+	// Triangle and TTri are included in the Diagonal interface
 	// to allow the use of Diagonal types in triangular functions.
 	Triangle() (int, TriKind)
 	TTri() Triangular
diff --git a/mat/triband.go b/mat/triband.go
index bb0d847d..21144719 100644
--- a/mat/triband.go
+++ b/mat/triband.go
@@ -68,7 +68,7 @@ var (
 	_        UntransposeTriBander = tTriBand
 )
 
-// TransposeBandTri is a type for performing an implicit transpose of a TriBanded
+// TransposeTriBand is a type for performing an implicit transpose of a TriBanded
 // matrix. It implements the TriBanded interface, returning values from the
 // transpose of the matrix within.
 type TransposeTriBand struct {
@@ -110,7 +110,7 @@ func (t TransposeTriBand) Bandwidth() (kl, ku int) {
 	return ku, kl
 }
 
-// TTri performs an implicit transpose by returning the TriBand field.
+// TBand performs an implicit transpose by returning the TriBand field.
 func (t TransposeTriBand) TBand() Banded {
 	return t.TriBanded
 }
@@ -294,7 +294,7 @@ func (t *TriBandDense) TriBand() (n, k int, kind TriKind) {
 	return t.mat.N, t.mat.K, TriKind(!t.IsZero()) && t.triKind()
 }
 
-// TBandTri performs an implicit transpose by returning the receiver inside a TransposeTriBand.
+// TTriBand performs an implicit transpose by returning the receiver inside a TransposeTriBand.
 func (t *TriBandDense) TTriBand() TriBanded {
 	return TransposeTriBand{t}
 }