1
\documentclass[10pt,a4paper]{article}
    \usepackage[utf8]{inputenc}
    \usepackage{amsmath}
    \usepackage{amsfonts}
    \usepackage{amssymb}
    \usepackage{pgfplots}
    \begin{document}
    \textit{Induc.:} 
    \begin{align*}
    \hspace{2cm}\Gamma (n+1)&=n\Gamma (n) && (B)\\
    &=n\cdot (n-1)! && (\textit{AA})
    \end{align*}
    \end{document}

Do you have any idea how i can have the Start of the Align environment right behind the "Induc." so like 2 rows higher?

Edit Problem:

\documentclass[10pt,a4paper]{article}
\usepackage[utf8]{inputenc}
\usepackage{amsmath}
\usepackage{amsthm}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{pgfplots}
\begin{document}
\begin{proof}
\textit{Induktionsanfang:} $\Gamma (1)=\int_0^\infty e^{-t}dt=1=0!$\\
\hspace{1cm}\\
\textit{Induktionsschritt:} \qquad
$\begin{aligned}[t]
\hspace{-0.7cm}\Gamma (n+1)&=n\Gamma (n) \hspace{1.6cm} (2.85)\\
&=n\cdot (n-1)! \qquad (\textit{Induktionsvoraussetzung})\\
&=n!
\end{aligned}$
\end{proof}
\end{document}
2

You can use aligned inside an in-line math $ .. $ mode.

\documentclass[10pt,a4paper]{article}
    \usepackage[utf8]{inputenc}
    \usepackage{amsmath}
    \usepackage{amsfonts}
    \usepackage{amssymb}
    \usepackage{pgfplots}
    \begin{document}
    \textit{Induc.:} \qquad 
    $
    \begin{aligned}[t]
    \Gamma (n+1)&=n\Gamma (n) && (B)\\
    &=n\cdot (n-1)! && (\textit{AA})
    \end{aligned}
    $
    \end{document}

enter image description here

0

Perhaps, you'd like to have the alignment centred w.r.t. the remaining part of the line. I propose two variants with the linegoal package:

\documentclass[10pt,a4paper]{article}
\usepackage[utf8]{inputenc}
\usepackage{linegoal} 
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{pgfplots}
\begin{document}

\textit{Induc.:}$ \hfill
\begin{aligned}[t]
\Gamma (n+1)&=n\Gamma (n) && (B)\\
&=n\cdot (n-1)! && (\textit{AA})
\end{aligned} $\hfill\null \\
Some more text. Some more text. Some more text. Some more text. Some more text. Some more text. Some more text. Some more text.\bigskip

\textit{Induc.:} \makebox[\linegoal]{$
\begin{aligned}[t]
\Gamma (n+1)&=n\Gamma (n) && (B)\\
&=n\cdot (n-1)! && (\textit{AA})
\end{aligned} $} 
Some more text. Some more text. 

\end{document} 

enter image description here

  • Thank you.. the aligned environment is in a proof environment and it does not put the qed-box at the end. Do you know why? – chri11 Mar 1 at 11:52
  • At the end of the last line of the environment? – Bernard Mar 1 at 11:55
  • Yes i want it at the very end (of course) but it puts it next to the "Induc." line. – chri11 Mar 1 at 11:57
  • Did you try \qedhere in the place of \null for the first way, or inside \makebox for the other way? – Bernard Mar 1 at 12:01
  • both ways are not working.. – chri11 Mar 1 at 12:29

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