How can I fix the first equation to make all the three equations align at the positions marked by &
across align
and its nested aligned
while preserving the spacing \quad
before \text
in every equation?
In other words, I need the alignment at:
(1) The equation LHS,
(2) equal sign,
(3) \text{ }
, and
(4) \Omega
, \Gamma_l
, r=l_r
(while keeping them right-aligned/flushed)
\documentclass{article}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\begin{document}
\begin{align}
&\partial_t^\alpha T &=\left( \frac{1}{r} \partial_r T+%
\partial_r^2 T+%
\partial_z^2 T \right) &\quad &\text{in}~&\Omega\\
\intertext{subject to}
&\begin{aligned}
\partial_{n_l} T &= \frac{e^{-2r^2}}{N_k}n_z-B_iT && \text{on}~&\Gamma_l,\\
%
\partial_{r} T &= -B_iT && \text{on}~&r=l_r,
\end{aligned}
\end{align}
\end{document}
\notag
on the equation where you don't want the number. I don't do well with English and I often help myself with pictures :-). – Sebastiano Oct 23 '19 at 15:15