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{ 几个公式左边有一个共同的大括号，怎么写这个括号呢？

{ 几个公式左边有一个共同的大括号，怎么写这个括号呢？# TeX - TeX电子排版系统

T*y2005-10-13 07:10

1 楼

几个公式左边有一个共同的大括号，怎么加上这个括号呢？
\begin{align}
\begin{split}
\begin{array}{cc}
\left11 & left12\\
\left21 & left22\\
\vdots &
\end{array}
\end{split}
\end{align}
我知道如果不要写这个括号，中间的array不用也可以。
希望括号能包括这几行:
\left11 & left12\\
\left21 & left22\\
\vdots &

J*r2005-10-13 07:10

2 楼

\left\{\begin{array} ..... \end{array}\right.

【在 T*******y 的大作中提到】

: 几个公式左边有一个共同的大括号，怎么加上这个括号呢？
: \begin{align}
: \begin{split}
: \begin{array}{cc}
: \left11 & left12\\
: \left21 & left22\\
: \vdots &
: \end{array}
: \end{split}
: \end{align}

T*y2005-10-13 07:10

3 楼

I thought so and I tried so, but there's error message popping up
'Missing delimiter (.inserted).' at the line of \end{align}
Do you know what happened? Thanks!
\begin{align}
\begin{split}
\left \{
\begin{array}{cc}
a & b\\
c & d\\
\vdots &
\end{array}
\right
\end{split}
\end{align}

【在 J*******r 的大作中提到】

: \left\{\begin{array} ..... \end{array}\right.

J*r2005-10-13 07:10

4 楼

\left\{ not \left \{
btw, you don't need to use align or split,
just use equation.

【在 T*******y 的大作中提到】

: I thought so and I tried so, but there's error message popping up
: 'Missing delimiter (.inserted).' at the line of \end{align}
: Do you know what happened? Thanks!
: \begin{align}
: \begin{split}
: \left \{
: \begin{array}{cc}
: a & b\\
: c & d\\
: \vdots &

T*y2005-10-13 07:10

5 楼

yeah, I tried \left\{ , but it didn't work, that's why I tried \left \{
mindlessly to just have a look. of course it didn't work either.
originally I don't need to use \array, so I used the \align and \split to make
the equation number appear once. anyway I tried \equation again like this.
\begin{equation}
%\begin{align}
%\begin{split}
\left\{
\begin{array}{cc}
a&b\\
c&d
\end{array}
\right
%\end{split}
%\end{align}
\end{equation}
yet it still didn't work.
But if I change the \right to be \right\

【在 J*******r 的大作中提到】

: \left\{ not \left \{
: btw, you don't need to use align or split,
: just use equation.

T*y2005-10-13 07:10

6 楼

All right, I see.
I did see your "\right." I should have used it verbatimly with the ".", which
suppressed the right bracket.
Thanks a lot!

make

【在 T*******y 的大作中提到】

: yeah, I tried \left\{ , but it didn't work, that's why I tried \left \{
: mindlessly to just have a look. of course it didn't work either.
: originally I don't need to use \array, so I used the \align and \split to make
: the equation number appear once. anyway I tried \equation again like this.
: \begin{equation}
: %\begin{align}
: %\begin{split}
: \left\{
: \begin{array}{cc}
: a&b\\

T*y2005-10-13 07:10

7 楼

Also when the formulas are listed in the array, the \equation will generate
only one equation number as well, so the \align and \split don't need to be
used any more.
Thanks again!

which

【在 T*******y 的大作中提到】

: All right, I see.
: I did see your "\right." I should have used it verbatimly with the ".", which
: suppressed the right bracket.
: Thanks a lot!
:
: make

h*n2005-10-13 07:10

8 楼

have you tried \begin{cases} ?

【在 T*******y 的大作中提到】

T*y2005-10-13 07:10

9 楼

I just tried it. Thanks a lot!

【在 h***n 的大作中提到】

: have you tried \begin{cases} ?

T*n2005-10-13 07:10

10 楼

The "cases" environment is the correct method, but it
does force the equations into \textstyle, i.e., fractions some
out small and summation operator limits come out on the
side. To get regular size equations within cases, add a
\displaystyle declaration right after \begin{cases}.

【在 T*******y 的大作中提到】

: I just tried it. Thanks a lot!