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When using \left| and \right| to typeset absolute value, I get unnecessary space as follows

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\documentclass[11pt, a4paper]{IEEEtran} \usepackage{amsmath} \usepackage{amssymb, amsfonts} \usepackage{adjustbox} \begin{document} \begin{equation} SDSCR_{i} = \frac{\left| V_{R, \thinspace i} \right|^{2}}{ \left| S_{eq, \thinspace i}^{\adjustbox{raise=0.1\baselineskip}{*}} \right| \left| Z_{RR, \thinspace ii} \right|} \end{equation} \end{document}
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  • That is because delimiters are symmetric w.r.t. the math axis, and there is only a discrete set of sizes Commented Jan 18, 2019 at 19:46
  • Why do you raise the * superscript even higher? That the main cause... Commented Jan 18, 2019 at 19:49
  • @Werner For aesthetics because the variable would look crowded. Commented Jan 18, 2019 at 19:52
  • If SDSCR is an identifier/variable, it should not be typeset in math italic -- it looks awful that way Commented Jan 18, 2019 at 19:57
  • @ChristianHupfer. Most people here seem to not like italic math, but in electrical engineering, italic math for variables and even subscripts somtimes is the norm. Commented Jan 18, 2019 at 20:03

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delimiters are centred on the math axis, so by making the * extra high you are forcing the delimiters to have extra depth, but it is usually better to use fixed size delimiter. Also never use the math italic font for multi-letter identifiers;

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\documentclass[11pt, a4paper]{IEEEtran} \usepackage{amsmath} \usepackage{amssymb, amsfonts} \begin{document} \begin{equation} \mathit{SDSCR}_{i} = \frac{\bigl| V_{\mathit{f}R, i} \bigr|^{2}}{ \bigl| S_{\mathit{eq}, i}^{*} \bigr| \bigl| Z_{\mathit{RR}, ii} \bigr|} \end{equation} \end{document}
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