Image credit: APEX, the Atacama Pathfinder EXperiment telescope
Quote for the day,
"I prefer to accent “unity” rather than “generality.” But for me these are two aspects of one quest. Unity represents the profound aspect , and generality the superﬁcial." - Alexander Grothendieck
link --> How Grothendieck simplified Algebraic Geometry
As Velleman points out in his "How to do Proofs", proofs starting from conclusion are by means of reexpression(I'm not sure who first came upon this proof technique/insight actually) . . . here, we see Algebraic Geometry being reformulated many times; this cuts through and unifies much mathematical history from the 1800s up to . . . Alexander Grothendieck.