I started out my mathematics career by working on Palais' modern formulation of a very useful classical theory, the calculus of variations . I decided Einstein 's general relativity was too hard, but managed to learn a lot about geometry of space time. I did some very technical work in partial differential equations, made an unsuccessful pass at shock waves, worked in scale invariant variational problems, made a poor stab at three dimensional manifold topology, learned gauge field theory and then some about applications to four dimensional manifolds, and have recently been working n equations with algebraic infinite symmetries.
Ako nagpasya Einstein 's pangkalahatang kapamanggitan ay masyadong matigas, ngunit pinamamahalaang upang malaman ng maraming tungkol sa geometry ng space oras. Ako did ang ilang napaka-teknikal na trabaho sa mga bahagi ng kaugalian equation, na ginawa ng isang nabigo pumasa sa shock waves, nagtrabaho sa iskala invariant variational problema, na ginawa ng isang mahinang-ulos sa tatlong kalawakan sari-sari topology, natutunan panukat ng patlang ng teorya at pagkatapos ng ilang tungkol sa mga aplikasyon sa apat na sukat manifolds, at kamakailan-lamang ay nagtatrabaho n equation na may algebraic walang hanggan symmetries.