I find a few typos a few days after submitting a paper in the field of applied math (mathematical social science). The typos are in the proof to the main theorem: I've wrongly written some variables "j" as "i". Some formulas were supposed to contain both i's and j's, but some of them were switched to the other one.
So I guess this could be a decisive factor.
I've checked two similar questions here; the answers are suggesting "Don't worry. Typos are not decisive factors". However in math, it is usual that the referees have a high standard of rigidity, and say that they cannot understand the proof, because it is mistaken.
Shall I email the editor as soon as possible? The status is "under review".