This suggestion was mine. Although “proposition” can mean many things, we are
talking about mathematical developments. Quite a common convention is to
reserve “theorem” for one or two main results, and “lemma” for technical
results of no general interest, leaving “proposition” as the main
On 06/10/2015 21:46, Makarius wrote:
* Toplevel theorem statement 'proposition' is another alias for
'theorem'.
Although this is consistent with the usage in mathematics, it is at odds with
the usage in logic and in Isabelle where propositions are simply formulas, not
necessarily provable
