Foucault's the Author Function

The author is not necessarily synonymous with the narrator within a text, just as the author's history is not synonymous with the writer who is immediate. So this is that distinction between the author and writer here again. Foucault provides the example of math, like a math book. I think if I were to write a book explaining some mathematical theorems or something. Now in the case of a math book, Foucault identifies three different eyes or three different selves. And then the third one, the one that reflects back, is kind of exists in between.