well there is a difference i guess.
slumdog was based on the movie from what i heard. so it was a collaboration sort of.
3 idiots would probably be a copyright of vidhu vinod chopra. he did not use bhagat's book name... bhagat probably cannot use the movie's name as well.
site:vinodchopra.com chetan bhagat - Google Search still cannot find a copy of the contract signed between chopra and bhagat tho.
Hirani distributed copies of an agreement of credit and a non-disclosure agreement signed by Bhagat Sep 1, 2005 and Oct 3, 2007 respectively. Screenplay writer Abhijat Joshi was also present at the media meet.
The non-disclosure agreement was signed after Hirani gave a \"four-hour narration\" of the final script to Bhagat, the director said.
\"The director took my book as the base but he has changed it according to his requirements. He took permission from me before taking my story but has not involved me in making it into the final script. But he has shown me the final script and I have liked it too,\" Bhagat had said in the copy.
Producer Vidhu Vinod Chopra has said that as per their agreement, Bhagat's name appeared in the rolling credits and he was paid the due amount.
Hirani, who has helmed movies like \"Munnabhai MBBS\" and \"Lage Raho Munnabhai\", also pointed out that the producer had bought the rights of \"Five Point Someone\".
Hence, it was their prerogative whether to use \"five per cent of the book or 70 per cent of it\".
We had bought rights of Chetan Bhagat's book: Hirani - India - The Times of India