Passage: Usually described as a psychological horror film, Black Swan can also be interpreted as a metaphor for achieving artistic perfection, with all of the psychological and physical challenges one might encounter, i.e. "the film can be perceived as a poetic metaphor for the birth of an artist, that is, as a visual representation of Nina's psychic odyssey toward achieving artistic perfection and of the price to be paid for it."Aronofsky conceived the premise by connecting his viewings of a production of Swan Lake with an unrealized screenplay about understudies and the notion of being haunted by a double, similar to the folklore surrounding doppelgängers. Aronofsky cites Fyodor Dostoyevsky's The Double as another inspiration for the film. The director also considered Black Swan a companion piece to his 2008 film The Wrestler, with both films involving demanding performances for different kinds of art. He and Portman first discussed the project in 2000, and after a brief attachment to Universal Studios, Black Swan was produced in New York City in 2009 by Fox Searchlight Pictures. Portman and Kunis trained in ballet for several months before filming began, and notable figures from the ballet world helped with film production to shape the ballet presentation.

Question: What serves as an inspiration for the film Black Swan?
Fyodor Dostoyevsky's The Double