Buddhist philosophyBuddhist philosophy is the ancient Indian philosophical system that developed within the religio-philosophical tradition of Buddhism. It comprises all the philosophical investigations and systems of rational inquiry that developed among various schools of Buddhism in ancient India following the parinirvāṇa of Gautama Buddha (c. 5th century BCE), as well as the further developments which followed the spread of Buddhism throughout Asia. Buddhism combines both philosophical reasoning and the practice of meditation.
ChandrakirtiChandrakirti (; ; 600-650, meaning "glory of the moon" in Sanskrit) or "Chandra" was a Buddhist scholar of the Madhyamaka school and a noted commentator on the works of Nagarjuna (150-250 CE) and those of his main disciple, Aryadeva. He wrote two influential works on madhyamaka, the Prasannapadā and the Madhyamakāvatāra. Chandrakirti does not seem to have been very influential during the 7th to 10 centuries, and his works were never translated into Chinese.
Square root of 2The square root of 2 (approximately 1.4142) is a positive real number that, when multiplied by itself, equals the number 2. It may be written in mathematics as or . It is an algebraic number, and therefore not a transcendental number. Technically, it should be called the principal square root of 2, to distinguish it from the negative number with the same property. Geometrically, the square root of 2 is the length of a diagonal across a square with sides of one unit of length; this follows from the Pythagorean theorem.
SvabhavaSvabhava (स्वभाव, svabhāva; सभाव, sabhāva; ; ) literally means "own-being" or "own-becoming". It is the intrinsic nature, essential nature or essence of beings. The concept and term svabhāva are frequently encountered in Hindu and Buddhist traditions such as Advaita Vedanta (e.g. in the Avadhūta Gītā), Mahāyāna Buddhism (e.g. in the Ratnagotravibhāga), Vaishnavism (e.g., the writings of Ramanuja) and Dzogchen (e.g. in the seventeen tantras). In the nondual Advaita Vedānta yoga text, Avadhūta Gītā, Brahman (in the Upanishadic denotation) is the svabhāva.
Tautology (logic)In mathematical logic, a tautology (from ταυτολογία) is a formula or assertion that is true in every possible interpretation. An example is "x=y or x≠y". Similarly, "either the ball is green, or the ball is not green" is always true, regardless of the colour of the ball. The philosopher Ludwig Wittgenstein first applied the term to redundancies of propositional logic in 1921, borrowing from rhetoric, where a tautology is a repetitive statement.
MadhyamakaMādhyamaka ("middle way" or "centrism"; ; Tibetan: དབུ་མ་པ ; dbu ma pa), otherwise known as Śūnyavāda ("the emptiness doctrine") and Niḥsvabhāvavāda ("the no svabhāva doctrine"), refers to a tradition of Buddhist philosophy and practice founded by the Indian Buddhist monk and philosopher Nāgārjuna (c. 150 – c. 250 CE). The foundational text of the Mādhyamaka tradition is Nāgārjuna's Mūlamadhyamakakārikā ("Root Verses on the Middle Way").
