MHB Basic symbology for involving a series but without summation necessarily

[GP72]

Hi. I'm sorry to bother you, but I was trying to find the symbol used for a vector of observations that doesn't implicitly infre multiplication or summation. I'm trying to express an inequality at the simple and general levels so that

\muAa \ne \muAA, \muaa

The idea is that this inequality should apply to means for factors (genotypes) at a single effect (a gene in this case), and more generally to the system of all means for all factors at all effects. Is that Pi that I should be using? I can't remember and can't find it.

 

[jacobi1]

I don't quite understand you. Are you simply trying to say that one vector of observations does not equal another?
In that case, it would be $$
Can you elaborate a little more on what you need?
Also, to type $\LaTeX$, use and $ symbols or $$[\MATH] tags.