【国际竞赛- 数学类】Duke Math Meet杜克数学大会（DMM）
2021-07-30Duke Math Meet杜克数学大会（简称：DMM）是由Duke Mathematics Union杜克大学数学联盟（简称：DUMU）成立并负责，并由杜克大学数学系所赞助的区域性数学赛事，主要面向中学生所开放。
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Severity: Notice
Message: Trying to get property of non-object
Filename: controllers/News.php
Line Number: 59
Backtrace:
File: /var/www/newxc/newxc2021/home/controllers/News.php
Line: 59
Function: _error_handler
File: /var/www/newxc/newxc2021/index.php
Line: 317
Function: require_once
Severity: Notice
Message: Trying to get property of non-object
Filename: controllers/News.php
Line Number: 75
Backtrace:
File: /var/www/newxc/newxc2021/home/controllers/News.php
Line: 75
Function: _error_handler
File: /var/www/newxc/newxc2021/index.php
Line: 317
Function: require_once
Severity: Notice
Message: Trying to get property of non-object
Filename: news/view.php
Line Number: 8
Backtrace:
File: /var/www/newxc/newxc2021/home/views/news/view.php
Line: 8
Function: _error_handler
File: /var/www/newxc/newxc2021/home/controllers/News.php
Line: 79
Function: view
File: /var/www/newxc/newxc2021/index.php
Line: 317
Function: require_once
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