如何才能使总和和分数的高度相同？

Question

我想知道我是否可以得到一些帮助。我想对齐分数和总和的高度。与分数相比，总和的位置太低了。我该如何实现这一点？

\documentclass[12pt,a4paper]{article}
\begin{document}
\[\Lambda_{entry} =\frac{\psi/(1-\delta)}{\psi/(1-\delta) + m_{I}} + \frac{m_{I}(1-\Phi)}{\psi/(1-\delta) + m_{I}} \sum^{}_{(\tilde{g},\tilde{b}) \in \{(g,b)\}}\hspace{0.1em}f_{\tilde{g},\tilde{b}-1}\]
\end{document}

Answer 1

我希望总和 [符号] 的最高点与分数的最高点对齐。

请谨慎询问...

\documentclass{article}
\usepackage{mathtools} % for '\mathclap' directive
\usepackage{graphicx}  % for '\scalebox' directive
\newcommand{\bigsum}{%
  \mathop{\vcenter{\hbox{\scalebox{1.5}{$\displaystyle\sum$}}}}}
  
\begin{document}

\[
\Lambda_{\mathrm{entry}} =
  \frac{\psi/(1-\delta)}{\psi/(1-\delta) + m_{I}}
+ \frac{m_{I}(1-\Phi  )}{\psi/(1-\delta) + m_{I}} \times
  \bigsum_{\mathclap{(\tilde{g},\tilde{b})\in\{(g,b)\}}}
  f^{}_{\tilde{g},\tilde{b}-1}
\]

\end{document}

Answer 2

\documentclass[12pt,a4paper]{article}
% https://tex.stackexchange.com/a/546690
\newcommand\vc[1]{\vcenter{\hbox{#1}}}
\begin{document}
\[\Lambda_{entry} =
  \frac{\psi/(1-\delta)}{\psi/(1-\delta) + m_{I}} +
  \frac{m_{I}(1-\Phi)}{\psi/(1-\delta) + m_{I}}
  \hspace{0.3em}
  \vc{$\displaystyle\sum_{(\tilde{g},\tilde{b}) \in \{(g,b)\}}
    \hspace{-1em}
    f_{\tilde{g},\tilde{b}-1}$}
\]
\end{document}