Using underset and overset together

Question

I would like to use underset and overset together above and below the word. Current  output looks like this:

begin{equation}
    v_t(j)=max^{N}_{i=1}v_{t-1}(i)a_{ij}b_j(o_t)
end{equation}

I would like both the superset and the underset to be placed exactly above and below the max.

gjkf · Accepted Answer

Welcome to TeX.SE!
As egreg pointed out in the comments, you can achieve what you want using max_{i=1}^{N}, like so:

documentclass[12pt]{article}
usepackage{amsmath} % Only for the equation* environment

begin{document}
  begin{equation*}
    v_t(j) = max_{i=1}^{N}v_{t-1}(i)a_{ij}b_j(o_t)
  end{equation*}
end{document}

Justin Turner · Answer

Here is maybe an easier fix yet - just nest overset in underset, or the other way around, as in:
v_t(j)=overset{N}{ underset{i=1}{max}} hspace{0.1cm} v_{t-1}(i)a_{ij}b_j(o_t)

Using underset and overset together

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