Chandragomin was an Indian Buddhist lay scholar who the Tibetan tradition believes challenged Chandrakirti. According to the Nepalese tradition, Chandragomin's student was Ratnakirti. It is unclear when Chandragomin lived, with estimates ranging between 5th to 7th-century CE.
Mādhyamaka thought had a major influence on the subsequent development of the Mahāyāna Buddhist tradition.
It is for instance the dominant interpretation of Buddhist philosophy in Tibetan Buddhism and has also been influential in East Asian Buddhist .
In Vajrayana Buddhism's Tantric teachings, the rituals require the guidance of a teacher.
The teacher is considered essential and to the Buddhist devotee, the guru is the "enlightened teacher and ritual master".
The teacher is known as the vajra guru (literally "diamond .