Mathematician who screwed up? (10)

I believe the answer is:

archimedes

'mathematician' is the definition.
(ancient Greek mathematician)

I can't explain the rest of the clue.

(Other definitions for archimedes that I've seen before include "Greek physicist" , "Greek mathematician ('Eureka')" , "Man of principle" , "Syracusan" , "Greek mathematician and inventor" .)

I've seen this clue in The Guardian.

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