What are the grounds for appeal against the denial of a habeas petition de novo?

Adams raises three issues on this appeal. He argues (1) that the length of his sentence should have been automatically reduced by his earned good time; (2) that due process entitled him to a hearing before his earned good time was taken away; and (3) that the practice of taking away good time credits from those inmates whose minimum terms are set at their maximum sentence violates their right to equal protection. We address these argument in turn. We review the denial of the habeas petition de novo. Robbins v. Christianson, 904 F.2d 492, 494 (9th Cir.1990).