 There are six major orthodox ("astika") schools of Hindu philosophy—Nyaya, Vaisheshika, Samkhya, Yoga, Mīmāṃsā and Vedanta, and five major heterodox (nāstika) schools of Śramaṇa— Ajivika, Ajñana, and Cārvāka.The four most studied nāstika schools, those rejecting the doctrine of Vedas, are Jainism, Buddhism, Cārvāka, and Ājīvika.Among the various orthodox schools of Hindu philosophy, Samkhya, Yoga and Mimamsa, while not rejecting either the Vedas or Brahman, typically reject a personal God, creator God, or a God with attributes.