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	<title>常用 &#8211; 编码无悔 /  Intent &amp; Focused</title>
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		<title>[原创]常用的数学符号总结</title>
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		<dc:creator><![CDATA[learnhard]]></dc:creator>
		<pubDate>Mon, 19 Aug 2013 02:33:27 +0000</pubDate>
				<category><![CDATA[Math]]></category>
		<category><![CDATA[原创]]></category>
		<category><![CDATA[含义]]></category>
		<category><![CDATA[常用]]></category>
		<category><![CDATA[数学符号]]></category>
		<category><![CDATA[符号]]></category>
		<category><![CDATA[高数]]></category>
		<category><![CDATA[高等数学]]></category>
		<guid isPermaLink="false">http://www.codelast.com/?p=6099</guid>

					<description><![CDATA[<p>
数学里经常会用一些符号来代替中文（例如<strong><span style="color:#ff0000;">∵</span></strong>表示&#8220;因为&#8221;），以达到书写简洁的目的，下面是一些常用的符号的总结。</p>
<p><span style="background-color:#00ff00;">（1）</span> <span class='MathJax_Preview'><img src='https://www.codelast.com/wp-content/plugins/latex/cache/tex_ac84d8a6f751001350a534ef3953b5d9.gif' style='vertical-align: middle; border: none; padding-bottom:2px;' class='tex' alt="s.t." /></span><script type='math/tex'>s.t.</script> ：<span style="color: rgb(0, 0, 255);">subject to</span>，<span style="color: rgb(0, 0, 255);">满足于</span>，<span style="color: rgb(0, 0, 255);">使得</span><br />
例：见下条。<br />
<span id="more-6099"></span><br />
<span style="background-color:#00ff00;">（2）</span>&#160; <span class='MathJax_Preview'><img src='https://www.codelast.com/wp-content/plugins/latex/cache/tex_93ebe8636e1f8d60004fe33d1321674e.gif' style='vertical-align: middle; border: none; padding-bottom:2px;' class='tex' alt="\exists " /></span><script type='math/tex'>\exists </script>  ：存在<br />
例： <span class='MathJax_Preview'><img src='https://www.codelast.com/wp-content/plugins/latex/cache/tex_93ebe8636e1f8d60004fe33d1321674e.gif' style='vertical-align: middle; border: none; padding-bottom:2px;' class='tex' alt="\exists " /></span><script type='math/tex'>\exists </script>  正整数 <span class='MathJax_Preview'><img src='https://www.codelast.com/wp-content/plugins/latex/cache/tex_7b8b965ad4bca0e41ab51de7b31363a1.gif' style='vertical-align: middle; border: none; padding-bottom:2px;' class='tex' alt="n" /></span><script type='math/tex'>n</script> ，<strong><span style="color: rgb(255, 0, 0);">s.t.</span></strong>&#160; <span class='MathJax_Preview'><img src='https://www.codelast.com/wp-content/plugins/latex/cache/tex_0ca59d22c2ace1251e1db4381fa4c77b.gif' style='vertical-align: middle; border: none; padding-bottom:2px;' class='tex' alt="\left&#124; {f(x)} \right&#124;/> n" /</span><script type='math/tex'>\left&#124; {f(x)} \right&#124; n</script> </p>
<p><span style="background-color:#00ff00;">（3）</span> <span class='MathJax_Preview'><img src='https://www.codelast.com/wp-content/plugins/latex/cache/tex_d4d49bead125261b226eaa867bd016ce.gif' style='vertical-align: middle; border: none; padding-bottom:2px;' class='tex' alt="\forall " /></span><script type='math/tex'>\forall </script> ：任意的<br />
例：对 <span class='MathJax_Preview'><img src='https://www.codelast.com/wp-content/plugins/latex/cache/tex_a1e7de72dccfe69fe17b57d96b9f4499.gif' style='vertical-align: middle; border: none; padding-bottom:2px;' class='tex' alt="\forall x/> 0" /</span><script type='math/tex'>\forall x 0</script> ，有 <span class='MathJax_Preview'><img src='https://www.codelast.com/wp-content/plugins/latex/cache/tex_feca3146c8704d4a903bf717bb4c972e.gif' style='vertical-align: middle; border: none; padding-bottom:2px;' class='tex' alt="f(x) < 0" /></span><script type='math/tex'>f(x) < 0</script> <br />
<span style="color: rgb(255, 255, 255);">文章来源：</span><a href="http://www.codelast.com/" target="_blank" rel="noopener noreferrer"><span style="color: rgb(255, 255, 255);">http://www.codelast.com/</span></a>&#8230; <a href="https://www.codelast.com/%e5%8e%9f%e5%88%9b%e5%b8%b8%e7%94%a8%e7%9a%84%e6%95%b0%e5%ad%a6%e7%ac%a6%e5%8f%b7%e6%80%bb%e7%bb%93/" class="read-more">Read More </a></p>]]></description>
										<content:encoded><![CDATA[<p>
数学里经常会用一些符号来代替中文（例如<strong><span style="color:#ff0000;">∵</span></strong>表示&ldquo;因为&rdquo;），以达到书写简洁的目的，下面是一些常用的符号的总结。</p>
<p><span style="background-color:#00ff00;">（1）</span> <span class='MathJax_Preview'><img src='https://www.codelast.com/wp-content/plugins/latex/cache/tex_ac84d8a6f751001350a534ef3953b5d9.gif' style='vertical-align: middle; border: none; padding-bottom:2px;' class='tex' alt="s.t." /></span><script type='math/tex'>s.t.</script> ：<span style="color: rgb(0, 0, 255);">subject to</span>，<span style="color: rgb(0, 0, 255);">满足于</span>，<span style="color: rgb(0, 0, 255);">使得</span><br />
例：见下条。<br />
<span id="more-6099"></span><br />
<span style="background-color:#00ff00;">（2）</span>&nbsp; <span class='MathJax_Preview'><img src='https://www.codelast.com/wp-content/plugins/latex/cache/tex_93ebe8636e1f8d60004fe33d1321674e.gif' style='vertical-align: middle; border: none; padding-bottom:2px;' class='tex' alt="\exists " /></span><script type='math/tex'>\exists </script>  ：存在<br />
例： <span class='MathJax_Preview'><img src='https://www.codelast.com/wp-content/plugins/latex/cache/tex_93ebe8636e1f8d60004fe33d1321674e.gif' style='vertical-align: middle; border: none; padding-bottom:2px;' class='tex' alt="\exists " /></span><script type='math/tex'>\exists </script>  正整数 <span class='MathJax_Preview'><img src='https://www.codelast.com/wp-content/plugins/latex/cache/tex_7b8b965ad4bca0e41ab51de7b31363a1.gif' style='vertical-align: middle; border: none; padding-bottom:2px;' class='tex' alt="n" /></span><script type='math/tex'>n</script> ，<strong><span style="color: rgb(255, 0, 0);">s.t.</span></strong>&nbsp; <span class='MathJax_Preview'><img src='https://www.codelast.com/wp-content/plugins/latex/cache/tex_0ca59d22c2ace1251e1db4381fa4c77b.gif' style='vertical-align: middle; border: none; padding-bottom:2px;' class='tex' alt="\left| {f(x)} \right| > n" /></span><script type='math/tex'>\left| {f(x)} \right| > n</script> </p>
<p><span style="background-color:#00ff00;">（3）</span> <span class='MathJax_Preview'><img src='https://www.codelast.com/wp-content/plugins/latex/cache/tex_d4d49bead125261b226eaa867bd016ce.gif' style='vertical-align: middle; border: none; padding-bottom:2px;' class='tex' alt="\forall " /></span><script type='math/tex'>\forall </script> ：任意的<br />
例：对 <span class='MathJax_Preview'><img src='https://www.codelast.com/wp-content/plugins/latex/cache/tex_a1e7de72dccfe69fe17b57d96b9f4499.gif' style='vertical-align: middle; border: none; padding-bottom:2px;' class='tex' alt="\forall x > 0" /></span><script type='math/tex'>\forall x > 0</script> ，有 <span class='MathJax_Preview'><img src='https://www.codelast.com/wp-content/plugins/latex/cache/tex_feca3146c8704d4a903bf717bb4c972e.gif' style='vertical-align: middle; border: none; padding-bottom:2px;' class='tex' alt="f(x) < 0" /></span><script type='math/tex'>f(x) < 0</script> <br />
<span style="color: rgb(255, 255, 255);">文章来源：</span><a href="http://www.codelast.com/" target="_blank" rel="noopener noreferrer"><span style="color: rgb(255, 255, 255);">http://www.codelast.com/</span></a><br />
<span style="background-color:#00ff00;">（4）</span> <span class='MathJax_Preview'><img src='https://www.codelast.com/wp-content/plugins/latex/cache/tex_583913240f5cd0f23a13666fa75f0713.gif' style='vertical-align: middle; border: none; padding-bottom:2px;' class='tex' alt="N(\mathop a\limits^ \wedge ,\delta ) = \left\{ {\left. x \right|0 < \left| {x - a} \right| < \delta } \right\} = N(a,\delta )\backslash \left\{ a \right\}" /></span><script type='math/tex'>N(\mathop a\limits^ \wedge ,\delta ) = \left\{ {\left. x \right|0 < \left| {x - a} \right| < \delta } \right\} = N(a,\delta )\backslash \left\{ a \right\}</script> ：点 x 的去心领域&nbsp;<br />
&ldquo;去心&rdquo;就是在字母上面加一个 ^ 符号。<br />
注意最右边一个式子里不是除号，是右斜杠，它表示在 <span class='MathJax_Preview'><img src='https://www.codelast.com/wp-content/plugins/latex/cache/tex_bf08fb50b5b569418c85efdd6ffe739f.gif' style='vertical-align: middle; border: none; padding-bottom:2px;' class='tex' alt="N(a,\delta )" /></span><script type='math/tex'>N(a,\delta )</script> 这个集合中去掉 <span class='MathJax_Preview'><img src='https://www.codelast.com/wp-content/plugins/latex/cache/tex_c94c17ef5b2a8cff9ab0cf6be009ef09.gif' style='vertical-align: middle; border: none; padding-bottom:2px;' class='tex' alt="\{ a\} " /></span><script type='math/tex'>\{ a\} </script> 这个集合，正好就是 <span class='MathJax_Preview'><img src='https://www.codelast.com/wp-content/plugins/latex/cache/tex_0cc175b9c0f1b6a831c399e269772661.gif' style='vertical-align: middle; border: none; padding-bottom:2px;' class='tex' alt="a" /></span><script type='math/tex'>a</script> 的去心领域。</p>
<p><span style="background-color:#00ff00;">（5）</span> <span class='MathJax_Preview'><img src='https://www.codelast.com/wp-content/plugins/latex/cache/tex_08acfad228c822fafea48aa4d047ebc3.gif' style='vertical-align: middle; border: none; padding-bottom:2px;' class='tex' alt="f(x) \in C(a,b)" /></span><script type='math/tex'>f(x) \in C(a,b)</script> ： <span class='MathJax_Preview'><img src='https://www.codelast.com/wp-content/plugins/latex/cache/tex_50bbd36e1fd2333108437a2ca378be62.gif' style='vertical-align: middle; border: none; padding-bottom:2px;' class='tex' alt="f(x)" /></span><script type='math/tex'>f(x)</script> 在 <span class='MathJax_Preview'><img src='https://www.codelast.com/wp-content/plugins/latex/cache/tex_2d05e1f15387f87456155cd96cc06235.gif' style='vertical-align: middle; border: none; padding-bottom:2px;' class='tex' alt="(a,b)" /></span><script type='math/tex'>(a,b)</script> 内连续</p>
<p><span style="background-color:#00ff00;">（6）</span>关于&ldquo;可导&rdquo;的一些记号<br />
 <span class='MathJax_Preview'><img src='https://www.codelast.com/wp-content/plugins/latex/cache/tex_fd91c508f91c2c84498680bd337c1d7a.gif' style='vertical-align: middle; border: none; padding-bottom:2px;' class='tex' alt="y = f(x)" /></span><script type='math/tex'>y = f(x)</script> 在 <span class='MathJax_Preview'><img src='https://www.codelast.com/wp-content/plugins/latex/cache/tex_61b74dc3e9bb4fbc39f8d9e90b8d62e4.gif' style='vertical-align: middle; border: none; padding-bottom:2px;' class='tex' alt="{{x_0}}" /></span><script type='math/tex'>{{x_0}}</script> 点可导，记为 <span class='MathJax_Preview'><img src='https://www.codelast.com/wp-content/plugins/latex/cache/tex_452f7b0a943f8a05df0876eb5ba76136.gif' style='vertical-align: middle; border: none; padding-bottom:2px;' class='tex' alt="f(x) \in D({x_0})" /></span><script type='math/tex'>f(x) \in D({x_0})</script> </p>
<div>
	 <span class='MathJax_Preview'><img src='https://www.codelast.com/wp-content/plugins/latex/cache/tex_fd91c508f91c2c84498680bd337c1d7a.gif' style='vertical-align: middle; border: none; padding-bottom:2px;' class='tex' alt="y = f(x)" /></span><script type='math/tex'>y = f(x)</script> 在 <span class='MathJax_Preview'><img src='https://www.codelast.com/wp-content/plugins/latex/cache/tex_2d05e1f15387f87456155cd96cc06235.gif' style='vertical-align: middle; border: none; padding-bottom:2px;' class='tex' alt="(a,b)" /></span><script type='math/tex'>(a,b)</script> 内每一点处都可导，则称 <span class='MathJax_Preview'><img src='https://www.codelast.com/wp-content/plugins/latex/cache/tex_fd91c508f91c2c84498680bd337c1d7a.gif' style='vertical-align: middle; border: none; padding-bottom:2px;' class='tex' alt="y = f(x)" /></span><script type='math/tex'>y = f(x)</script> 在 <span class='MathJax_Preview'><img src='https://www.codelast.com/wp-content/plugins/latex/cache/tex_2d05e1f15387f87456155cd96cc06235.gif' style='vertical-align: middle; border: none; padding-bottom:2px;' class='tex' alt="(a,b)" /></span><script type='math/tex'>(a,b)</script> 内可导，记为 <span class='MathJax_Preview'><img src='https://www.codelast.com/wp-content/plugins/latex/cache/tex_4c86c6aea1d2250aadb069284cfa3783.gif' style='vertical-align: middle; border: none; padding-bottom:2px;' class='tex' alt="f(x) \in D(a,b)" /></span><script type='math/tex'>f(x) \in D(a,b)</script> </div>
<div>
	 <span class='MathJax_Preview'><img src='https://www.codelast.com/wp-content/plugins/latex/cache/tex_fd91c508f91c2c84498680bd337c1d7a.gif' style='vertical-align: middle; border: none; padding-bottom:2px;' class='tex' alt="y = f(x)" /></span><script type='math/tex'>y = f(x)</script> 在区间 <span class='MathJax_Preview'><img src='https://www.codelast.com/wp-content/plugins/latex/cache/tex_dd7536794b63bf90eccfd37f9b147d7f.gif' style='vertical-align: middle; border: none; padding-bottom:2px;' class='tex' alt="I" /></span><script type='math/tex'>I</script> 上可导，记为 <span class='MathJax_Preview'><img src='https://www.codelast.com/wp-content/plugins/latex/cache/tex_d508e1cbab0eee970dc15901381e424b.gif' style='vertical-align: middle; border: none; padding-bottom:2px;' class='tex' alt="f(x) \in D(I)" /></span><script type='math/tex'>f(x) \in D(I)</script> </p>
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