Category Theory Lecture Notes for ESSLLI Michael Barr Department
... graph: because of Russell’s paradox, its nodes and its arrows do not form sets. 1.1.4 Example It is often convenient to picture a relation on a set as a graph. For example, let A = {1, 2, 3}, B = {2, 3, 4} and α = {(1, 2), (2, 2), (2, 3), (1, 4)} Then α can be pictured as ...
... graph: because of Russell’s paradox, its nodes and its arrows do not form sets. 1.1.4 Example It is often convenient to picture a relation on a set as a graph. For example, let A = {1, 2, 3}, B = {2, 3, 4} and α = {(1, 2), (2, 2), (2, 3), (1, 4)} Then α can be pictured as ...