4

Question-1

I want to increase space front side and backside of semicolon(;).

Question-2

I want to change position of y->\infty at downward side (Same as at y->0)

MWE:

\documentclass[12pt]{article}
\usepackage[a4paper,top=0.8 in,bottom=0.8 in,left=0.6 in,right=0.5 in]{geometry}
\usepackage[utf8]{inputenc}
\usepackage[misc]{ifsym}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{graphicx}
\usepackage{delarray}
\usepackage[dvipsnames]{xcolor}
\usepackage{tikz}
\usetikzlibrary{calc,shapes}
\usepackage{parskip}
\usepackage{cellspace}
\setlength\cellspacetoplimit{4pt}
\setlength\cellspacebottomlimit{4pt}
\begin{document}
\large
The associated boundary conditions are

\(\begin{array}[t].{l}\}
u = U_{0} \\[8pt]
v = V_{w} \\ [8pt]
N = 0 \\ [8pt]
T = T_{w} \\ [8pt]
C = C_{w} 
\end{array}_{at\; y \,\to \,0}
\begin{array}[t]{@{}c@{}}\\{}; {}\\{}\end{array}
\begin{array}[t].{l}\}
u \,\to\, 0\\[8pt]
N \,\to\, 0\\[8pt]
T \,\to\, T_{\infty}\\[8pt]
C \,\to\, C_{\infty}
\end{array}\)_{as\; y \,\to \,\infty}
\end{document}  
6
  • You are aware that your example does not compile? For example why do you have \(...\)_{as\; y \,\to \,\infty} as the _{as\; y \,\to \,\infty} part requires math mode and \) ends inline math mode.
    – daleif
    Jan 12 at 13:20
  • @daleif Its compile good at my end.
    – Math-Man
    Jan 12 at 13:31
  • Are you sure? Missing $ inserted. <inserted text> $ l.34 \end{array}\)_ {as\; y \,\to \,\infty}
    – daleif
    Jan 12 at 13:34
  • If this compliles at your end (and your end is not Overleaf where a failed compilation is often overlooked) then please provide the log file from compiling exactly this MWE
    – daleif
    Jan 12 at 13:35
  • My end is overleaf
    – Math-Man
    Jan 12 at 13:43
1

You have a subscript outside of math mode.

I believe it's better to use a display and also align differently the contents. I propose both top alignment and center alignment (which I'd prefer).

\documentclass[12pt]{article}
\usepackage[a4paper,top=0.8 in,bottom=0.8 in,left=0.6 in,right=0.5 in]{geometry}
\usepackage[utf8]{inputenc}
\usepackage[misc]{ifsym}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{graphicx}
\usepackage{delarray}
\usepackage[dvipsnames]{xcolor}
\usepackage{tikz}
\usetikzlibrary{calc,shapes}
\usepackage{parskip}
\usepackage{cellspace}
\setlength\cellspacetoplimit{4pt}
\setlength\cellspacebottomlimit{4pt}

\begin{document}
The associated boundary conditions are
\[
\renewcommand{\arraystretch}{1.2}
\begin{array}[t].{@{}r@{}>{{}}c<{{}}@{}l@{}}\}
u &=& U_{0} \\
v &=& V_{w} \\
N &=& 0 \\
T &=& T_{w} \\
C &=& C_{w} 
\end{array}_{\text{as $y \to 0$}}
\quad ; \quad
\begin{array}[t].{@{}r@{}>{{}}c<{{}}@{}l@{}}\}
u &\to& 0\\
N &\to& 0\\
T &\to& T_{\infty}\\
C &\to& C_{\infty}
\end{array}_{\text{as $y \to \infty$}}
\]
The associated boundary conditions are
\[
\renewcommand{\arraystretch}{1.2}
\left.
\begin{array}{@{}r@{}>{{}}c<{{}}@{}l@{}}
u &=& U_{0} \\
v &=& V_{w} \\
N &=& 0 \\
T &=& T_{w} \\
C &=& C_{w} 
\end{array}
\right\}_{\text{as $y \to 0$}}
\quad ; \quad
\left.
\begin{array}{@{}r@{}>{{}}c<{{}}@{}l@{}}
u &\to& 0\\
N &\to& 0\\
T &\to& T_{\infty}\\
C &\to& C_{\infty}
\end{array}
\right\}_{\text{as $y \to \infty$}}
\]
\end{document}  

enter image description here

Here is a third possibility:

\documentclass[12pt]{article}
\usepackage[a4paper,top=0.8 in,bottom=0.8 in,left=0.6 in,right=0.5 in]{geometry}
\usepackage[utf8]{inputenc}
\usepackage[misc]{ifsym}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{graphicx}
\usepackage{delarray}
\usepackage[dvipsnames]{xcolor}
\usepackage{tikz}
\usetikzlibrary{calc,shapes}
\usepackage{parskip}
\usepackage{cellspace}
\setlength\cellspacetoplimit{4pt}
\setlength\cellspacebottomlimit{4pt}

\begin{document}
The associated boundary conditions are
\[
\left.
\begin{aligned}
u &= U_{0} \\
v &= V_{w} \\
N &= 0 \\
T &= T_{w} \\
C &= C_{w} 
\end{aligned}
\right\}\text{as $y \to 0$};\quad
\left.
\begin{aligned}
u &\to 0\\
N &\to 0\\
T &\to T_{\infty}\\
C &\to C_{\infty}
\end{aligned}
\right\}\text{as $y \to \infty$}
\]
\end{document}  

enter image description here

5
  • Great.. Thanks a lot sir. May I change position of as y->0, I mean can we write in center instead of below.
    – Math-Man
    Jan 13 at 3:07
  • @Snehal I added a further possibility
    – egreg
    Jan 13 at 6:24
  • In above last code of boundary conditions Can we give equation number? Because I have been working with lots of equations and this one is in the intermediate level.
    – Math-Man
    Jan 19 at 7:24
  • @Snehal Use \begin{equation}...\end{equation} instead of \[...\]
    – egreg
    Jan 19 at 8:31
  • ok I understand once again thanks. Hoping that I will get benefit of your knowledge
    – Math-Man
    Jan 19 at 15:31
0

In Plain TeX, we can use \eqalign{...} as a part of the math formula.

$$
  \left.\eqalign{u &= U_0\cr w &= V_w\cr N &= 0\cr T &= T_w\cr C &= C_w}\right\}
   _{{\rm as}\ y\,\to\,\infty}
  \quad ; \quad
  \left.\eqalign{u &\to 0\cr N &\to 0\cr T &\to T_\infty\cr C &\to  C_\infty}\right\}
  _{{\rm as}\ y\,\to\,\infty}
$$

\bye

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