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Thanks localghost!
I actually found other similar unanswered questions and I think your contribution here will be appreaciated by many.

EDIT
Subsequently, I was confronted with the fact that subscripts are lowered when superscripts appear (I use a lot the transpose). To keep subscripts at the ...

This example entails multiple questions:
\documentclass{article}
\usepackage[T1]{fontenc}
\usepackage{mathtools}
\usepackage[itGreek,upgreek]{pxgreeks} % Upright lower (for vector notation) and slanted upper greeks

% New commands
\newcommand{\bbeta}[1]{\boldsymbol\beta_{\scriptscriptstyle #1 ...

Thanks Stefan.

I'd like to align the two equations in a certain way and keep the bullet point in between, is it possible?
The MWE shows my current situation and what type of alignment I am lookign for.

Thanks in advance.
\documentclass[serif,9pt]{beamer}
\begin{document}
\begin{frame}{Example}
\begin{itemize ...

Thanks for both answers, equally precious.

@Nikolay: I was sure I tried that solution, thanks a lot (but still do not understand the interaction between \mcolumn and @{extracolsep{\fill}}.
@Thorsten: I wish I knew about tabu! Lifesaver.

I can't make the the column equally spaced in this MWE (the last is off):


\documentclass{article}
\usepackage{mathtools,booktabs,xspace}
\newcommand{\avgrm}[2]{\ensuremath{\mathrm{\overline{#1}}_{#2}}\xspace}
\newcommand{\avgcj}[2]{\ensuremath{\overline{#1}_{#2}}\xspace}

\begin{document}
\begin ...

@Thorsten: thank you. It was easier than expected. I slightly modified your solution to align the split equations not with the "=" sign but after \beta_0 and cleaned up my code following your example.

I am trying to improve the following code:


\documentclass{article}
\usepackage{mathtools}

\newcommand{\RV} [0]{\ensuremath{\mathrm{RV}_t}}
\newcommand{\avgrm}[2]{\ensuremath{\mathrm{\overline{#1}}_{#2}}}
\newcommand{\avgcj}[2]{\ensuremath{\overline{#1}_{#2}}}

\begin{document}
\begin ...

I have no idea how to avoid the \wedge since it is a fixed part of this expression.
I was thinking to compress the ^- and ^+ into a single ^\mp and then leave the description of the left and right neighborhood in the text, but I don't know if mathematically it would be elegant or even make sense ...

For the inequality to follow I would like to receive:

general feedback (could it be written more elegantly?)
is it possible to reformulate the inequality in a compact way in order to avoid the \wedge ?

The code:

\documentclass{article}
\usepackage{amssymb,amsmath}

\providecommand{\abs}[1 ...