[phpBB Debug] PHP Notice: in file /includes/db/dbal.php on line 110: Undefined array key "cached"
[phpBB Debug] PHP Notice: in file /includes/db/dbal.php on line 111: Undefined array key "normal"
[phpBB Debug] PHP Notice: in file /includes/db/dbal.php on line 112: Undefined array key "total"
[phpBB Debug] PHP Notice: in file /includes/session.php on line 885: Cannot modify header information - headers already sent by (output started at /includes/functions.php:2922)
[phpBB Debug] PHP Notice: in file /includes/session.php on line 885: Cannot modify header information - headers already sent by (output started at /includes/functions.php:2922)
[phpBB Debug] PHP Notice: in file /includes/session.php on line 885: Cannot modify header information - headers already sent by (output started at /includes/functions.php:2922)
[phpBB Debug] PHP Notice: in file /includes/functions.php on line 3393: Cannot modify header information - headers already sent by (output started at /includes/functions.php:2922)
[phpBB Debug] PHP Notice: in file /includes/functions.php on line 3395: Cannot modify header information - headers already sent by (output started at /includes/functions.php:2922)
[phpBB Debug] PHP Notice: in file /includes/functions.php on line 3396: Cannot modify header information - headers already sent by (output started at /includes/functions.php:2922)
[phpBB Debug] PHP Notice: in file /includes/functions.php on line 3397: Cannot modify header information - headers already sent by (output started at /includes/functions.php:2922)
长途大巴 • 阅读主题 - 微分方程的背后到底代表了什么?

微分方程的背后到底代表了什么?

微分方程的背后到底代表了什么?

帖子guew 在 21 Apr 2009, 08:23

由于专业的需要,修完一门基础微分方程和边界问题的课。问题是在掌握了用技术性的技巧来解一般习题的情况下,对于微分方程的实质还是缺乏基本的概念。如,它所解释和描述的抽象到底什么?
guew
 
帖子: 322
加入: 25 Feb 2008, 12:08

Re: 微分方程的背后到底代表了什么?

帖子yijun 在 21 Apr 2009, 09:35

按照阿诺德的表述,微分方程描述的是特定的一类演化过程,这类演化过程必须满足三个条件:
1,严格因果律:就是经典物理里面的严格因果律-由此时的完全状态量可以推导出对象此前和未来的全部历程。
2,可微的;
3,有限维。
yijun
Site Admin
 
帖子: 4448
加入: 10 Feb 2007, 02:16
地区: 北京


回到 数学


谁在线

本版乘客: 没注册乘客 和 0 路人

cron