Modulo Z2 Invariant: What is it?

[tayyaba aftab]

what is modulo associated with z2 invariant?

 

[element4]

I don't think I understand your question, can you rephrase/be more specific?

 

[tayyaba aftab]

i alwyas read word "modulo 2" while reading z2 invariants.
i don't know what does that mean
so asked about that

 

[weejee]

That means even or odd.

More precisely, modulo 2 means that we are considering two numbers differing by a multiple of two as the same.

 

[hiyok]

That is, it can be either 0 or 1.