Many schools have written commentary on Brahma Sutras.
In the commentary to first verse, each school explains their meaning of atha and the prerequisites for study of brahman.
What do major schools say about prerequisites of study of Brahman? I mean advaita, dvaita and vishistadvaita school. I just read in one Brahma sutra commentary that study of Vedas is one of the prerequisite. What does this mean study of all the Vedas and Upanishads or anything else? Does it mean that one can't study Brahma Sutra commentaries without having studied all the Vedas first?