Who is the author of competition Athena and Poseidon?

The myth of the competition between Athena and Poseidon for the patronage of Athens is part of Greek mythology. It's not attributed to a single author, but rather developed over time through oral tradition and later written down by various ancient Greek authors.

Here are some key sources that mention the myth:

* Hesiod: The Theogony, one of the oldest surviving Greek poems, mentions the competition briefly.

* Ovid: His Metamorphoses, a Roman poem, tells the story in more detail, including the creation of the olive tree.

* Pausanias: A Greek travel writer, described the myth in his Description of Greece.

While the exact details of the myth may vary slightly in different versions, the core story remains consistent.