At a public auction in New York State, I purchased a painting that was advertised and sold as being an authentic, original work by a renowned 20th century artist. The painting turned out to be a fake, according to an art expert who did a formal, post-auction appraisal of the painting in question. What are my legal options? I'm also seeking the legal category this type of action falls under: fraud, misrepresentation, unjust enrichment, breach of warranties, etc. Thank you.