如何在HTML中编写求和表达式? [英] How to write summation expression in HTML?
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问题描述
如何为以下Latex编写等效的HTML表达式:
$$ \sum_ {k = 1} ^ Nk N-K + 1)
图片为:
I这样做:
Σ< sub> k = 1< / sub> <坐席将N< / SUP>
但输出是这样的
Σ k = 1 N
我不擅长HTML,我在网上搜索但找不到答案。
请在此帮助。谢谢!
解决方案
如果您在项目中需要很多东西可能会发现 MathJax 有用。否则,如果您只需要这一个公式,请尝试 - DEMO
< p>
< span>& Sigma;< / span>
k(N - k + 1)
< / p>
CSS
p {
height:50px;
line-height:50px;
}
span {
position:relative;
font-size:2.5em;
display:inline-block;
line-height:.7em;
vertical-align:middle;
}
span:之前{
font-size:12px;
display:block;
绝对位置;
剩下:0;
top:0;
内容:N;
width:22px;
text-align:center;
}
span:在{
font-size:12px;
display:block;
绝对位置;
剩下:0;
bottom:0;
内容:k = 1;
width:27px;
text-align:center;
}
How to write equivalent HTML expression for following Latex:
$$\sum_{k=1}^Nk(N-k+1)
The image is:
I did like this:
∑ <sub>k=1</sub> <sup>N</sup>
but output is like this
∑ k=1 N
I am not good at HTML and I searched on web but couldn't find answer. Please help on this..Thanks!
解决方案
If you need it for a lot of stuff in your project you'll probably find MathJax useful. Otherwise if you need just this one formula then try this - DEMO
<p>
<span>Σ</span>
k ( N - k + 1 )
</p>
CSS
p {
height: 50px;
line-height: 50px;
}
span {
position: relative;
font-size: 2.5em;
display: inline-block;
line-height: .7em;
vertical-align: middle;
}
span:before {
font-size: 12px;
display: block;
position absolute;
left: 0;
top: 0;
content: "N";
width: 22px;
text-align: center;
}
span:after {
font-size: 12px;
display: block;
position absolute;
left: 0;
bottom: 0;
content: "k = 1";
width: 27px;
text-align: center;
}
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