Advaita Vedanta

=====Writings=====
{{Main|Adi Shankara bibliography}}

Adi Shankara is best known for his reviews and commentaries (''Bhasyas'') on ancient Indian texts. His ''Brahmasutrabhasya'' (literally, commentary on [[Brahma Sutra]]) is a fundamental text of the Vedānta school of Hinduism.{{sfn|Mayeda|2006|pp=6–7}} His commentaries on ten [[Mukhya Upanishads|Mukhya]] (principal) Upanishads are also considered authentic by scholars.{{sfn|Mayeda|2006|pp=6–7}}{{sfn|Hacker|1995|p=30–31}} Other authentic works of Shankara include commentaries on the Bhagavad Gitā (part of his [[Prasthana Trayi]] Bhasya).{{sfn|Rambachan|1991|pp=xii–xiii}} He also authored [[Upadesasahasri]], his most important original philosophical work.<ref name=johnkoller>John Koller (2007), in Chad Meister and Paul Copan (Editors): ''The Routledge Companion to Philosophy of Religion'', Routledge, {{ISBN|978-1-134-18001-1}}, pp. 98–106</ref><ref name=halbfassyoga>Wilhelm Halbfass (1990), ''Tradition and Reflection: Explorations in Indian Thought'', State University of New York Press, {{ISBN|978-0-7914-0362-4}}, pp. 205–208</ref> The authenticity of Shankara being the author of {{IAST|[[Viveka Chudamani|Vivekacūḍāmaṇi]]}}<ref>Adi Shankaracharya, [https://archive.org/stream/vivekachudamanio00sankrich#page/n3/mode/2up Vivekacūḍāmaṇi] S Madhavananda (Translator), Advaita Ashrama (1921)</ref> has been questioned, and "modern scholars tend to reject its authenticity as a work by Shankara."<ref>John Grimes (2004), ''The Vivekacudamani of Sankaracarya Bhagavatpada: An Introduction and Translation'', Ashgate, {{ISBN|978-0-7546-3395-2}}, p.23</ref>