How do I properly display a term with a subscript on a subscript in LaTeX?

[Math Amateur]

I just posted on Noetherian Modules in the Linear and Abstract Algebra Forum ...

I wished to display a term with a subscript on a subscript as follows: N_i_j ...

But got an error ... can someone please help ...Peter

 

[Opalg]

I just posted on Noetherian Modules in the Linear and Abstract Algebra Forum ...

I wished to display a term with a subscript on a subscript as follows: N_i_j ...

But got an error ... can someone please help ...Peter

You need to use braces: N_{i_j} gives $N_{i_j}$.

 

[Math Amateur]

You need to use braces: N_{i_j} gives $N_{i_j}$.

Thanks Opalg ...

Appreciate your help ...

Peter