Let t be given.
We prove the intermediate
claim HtS:
SNo t.
An
exact proof term for the current goal is
(real_SNo t HtR).
We prove the intermediate
claim H0lttS:
0 < t.
An
exact proof term for the current goal is
(RltE_lt 0 t H0ltt).
We prove the intermediate
claim H1letS:
1 ≤ t.
An
exact proof term for the current goal is
(SNoLe_of_Rle 1 t H1let).
∎