But that "change" didn't persist. Another explanation is just that hewas an emerging talent, then he seemed to have done the thing mathematicians often do where he settled down to flesh out the brilliant ideas he'd already had, but then it became clear he was still producing innovative output!
Sorry not sure I understand you post, but if I follow:
- you're claiming that the Fields medal did not switch over in 1966 - I think many would disagree, that's generally cited as the year the change happened.
- you're claiming that a good explanation why Grothendieck didn't win in 1962 is because he was just fleshing things out? I think that is also incorrect - he introduced etale cohomology in 1960 - from 58-66 Grothendieck's output was pretty ridiculous.
