Revert "abstract.tex"

This reverts commit 4ec98b99d6380ced6c164ee15e714d56239ffb5f.
Revert "[ganesh] abstract nudge"

This reverts commit 9313821d29b15069e00069c6a187eb5a83b7ea21.
Revert "[ganesh] minor line-wrapping fix"

This reverts commit 3fdc9b1dbe7697308de0eaec826b34fc76a3d884.
Revert "[ganesh] rewordings/spellings"

This reverts commit 37086cbad92e7c15040f32a9fe3baa87bbaa0881.
Revert "[ganesh] abstract"

This reverts commit 148c1fda7ae0cf818ca5c4a07542847835e04e0e.
minor tweaks to intro (after discussion with Ganesh)