Closed nbloomf closed 6 years ago
Small comment about the discussion on functions.
Functions are defined in terms of binary relations, and they have a nice characterization that is dual to the concepts of "one-to-one" and "onto".
A function is a binary relation $f \subseteq A \times B$ that is also
This is an interesting observation. However, I am wondering if it should go in the footnotes, as it may be distracting a bit.
Small comment about the discussion on functions.
Functions are defined in terms of binary relations, and they have a nice characterization that is dual to the concepts of "one-to-one" and "onto".
A function is a binary relation $f \subseteq A \times B$ that is also