There is a tree, the tree of Transmigration, the Asvattha tree everlasting. Its roots are above in the Highest, and its branches are here below. Its leaves are sacred songs, and he who knows them knows the Vedas.
Its branches spread from earth to heaven, and the powers of nature give them life…
Men do not see the changing form of that tree, nor its beginning, nor its end, nor where its roots are. But let the wise see, and with the strong sword of dispassion let him cut this strong-rooted tree, and seek that path wherefrom those who go never return.
Bhagavad Gita, Chapter 15
Tree structures have been the object of extensive mathematical investigations for many years, long before the advent of computers, and many interesting facts have been discovered about them.