diff -r 4399bf266660 -r da6c7475dd0e src/LinOps.jl
--- a/src/LinOps.jl	Sat Feb 20 16:26:41 2021 -0500
+++ b/src/LinOps.jl	Sat Feb 20 19:10:50 2021 -0500
@@ -91,4 +91,16 @@
     return opnorm(op.m, 2)
 end
 
+function Base.:+(a::MatrixOp{T}, b::MatrixOp{T}) where T
+    return MatrixOp(a.m+b.m)
 end
+
+function Base.:-(a::MatrixOp{T}, b::MatrixOp{T}) where T
+    return MatrixOp(a.m-b.m)
+end
+
+function Base.:*(a::MatrixOp{T}, b::MatrixOp{T}) where T
+    return MatrixOp(a.m*b.m)
+end
+
+end