What delusions did john Nash have in A beautiful Mind?

In "A Beautiful Mind," John Nash experienced several delusions, primarily involving his belief in a conspiracy against him. He imagined that he was being recruited by a secret government agency to decipher coded messages and that he was involved in a larger, intricate plot. Additionally, he had vivid hallucinations of imaginary friends, including a roommate named Charles and a young girl named Marcee, who were not real but played significant roles in his life and mental struggles. These delusions were manifestations of his schizophrenia, which profoundly impacted his perception of reality.