Is there any consensus regarding whether one should write both "+" and "-" or only "+" when performing computations in characteristic two fields?
To give some context, I am writing my thesis, which largely considers curves over fields of positive characteristic $p > 0$. Often a result holds for $p >2$, and then there is an analogous result for $p = 2$.
Generally these analogous results will be placed in the same statement, or one immediately after the other. Hence I worry that only using "+" will be confusing for someone who is skimming through - saying something like "$a+b = c$ and hence $a = b + c$" may at least cause some momentary confusion. Also, in some cases it feels that the analogy between $p=2$ and $p >2$ is not as clear when replacing "-" by "+".
On the other hand, it does seem redundant to use both "+" and "-", and redundancy is not something mathematicians are keen on.
Overall I feel that in some instances I would prefer to use only "+", such as if the whole piece were in characteristic two, so I wondered whether this is a standard in anyway.