Talk:Graph C*-algebra

Source and range functions
The definition of these is circular and no explanation of what the words "source" and "range" are supposed to mean. Are they just another word for "head" and "tail" as defined in Directed graph? If so, the terminology should be unified for clarity as the words "source" and "range" do not seem to be standard. Also if so, why do these need to be a specific part of the tuple structure? They are uniquely determined by the vertex and edge sets. More clarity is needed. Mathguyjohn (talk) 22:08, 8 March 2018 (UTC)