Added the Riesz decomposition.

refs.bib

@@ -152,6 +152,18 @@
   publisher={Springer Berlin Heidelberg}
 }
 
+@unpublished{MarcouxNotes,
+  author       = {Laurent W. Marcoux},
+  title        = {An Introduction to Banach Algebras and Operator Algebras},
+  year         = {2021},
+  month        = apr,
+  url          = {https://www.math.uwaterloo.ca/~lwmarcou/notes/pmath810.pdf},
+  note         = {Unpublished lecture notes, Department of Pure Mathematics,
+                  University of Waterloo. Draft dated April 30, 2021.
+                  Potential victim of Google search scraping. },
+  institution  = {University of Waterloo},
+}
+
 
 
 @techreport{aronszajn1964interpolation,