What is the representation of "woman as mother" in James Joyce's A Portrait of the Artist As a Young Man?

In A
Portrait of the Artist As a Young Man, as in many of Joyce's other works, the idea of
the "woman as a mother" is subtly interwoven into the text.  Namely, Stephen Dedalus's
own mother is a character based on's own mother, and though she isn't a major character in the
novel, she is a constant presence in Stephen's mind.  Early in the...