﻿<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:trackback="http://madskills.com/public/xml/rss/module/trackback/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/"><channel><title>BlogJava-ThinkTalk-随笔分类-Thinking in maths</title><link>http://www.blogjava.net/ThinkingTalking/category/22141.html</link><description>Do what I can do!</description><language>zh-cn</language><lastBuildDate>Mon, 30 Apr 2007 02:20:20 GMT</lastBuildDate><pubDate>Mon, 30 Apr 2007 02:20:20 GMT</pubDate><ttl>60</ttl><item><title>映射</title><link>http://www.blogjava.net/ThinkingTalking/archive/2007/04/30/114689.html</link><dc:creator>ThinkingTalking</dc:creator><author>ThinkingTalking</author><pubDate>Mon, 30 Apr 2007 00:47:00 GMT</pubDate><guid>http://www.blogjava.net/ThinkingTalking/archive/2007/04/30/114689.html</guid><wfw:comment>http://www.blogjava.net/ThinkingTalking/comments/114689.html</wfw:comment><comments>http://www.blogjava.net/ThinkingTalking/archive/2007/04/30/114689.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.blogjava.net/ThinkingTalking/comments/commentRss/114689.html</wfw:commentRss><trackback:ping>http://www.blogjava.net/ThinkingTalking/services/trackbacks/114689.html</trackback:ping><description><![CDATA[一般地，设A、B是两个非空的集合，如果按某一个确定的对应法则f，使对于集合A中的任意一个元素x，在集合B中都有唯一确定的元素y与之对应，那么就称对应f：AB为从集合A到集合B的一个映射（mapping）．<br>记作&#8220;f：AB&#8221;<br>
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