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A PHP Error was encountered

Severity: Notice

Message: Trying to access array offset on value of type null

Filename: models/Site_model.php

Line Number: 233

Backtrace:

File: /var/www/html/KOL/voice/application/models/Site_model.php
Line: 233
Function: _error_handler

File: /var/www/html/KOL/voice/application/controllers/Exitpage.php
Line: 110
Function: get_keyword_cat

File: /var/www/html/KOL/voice/public/index.php
Line: 319
Function: require_once

疑難雜症萬事通 - positive operator - 前往 https://math.libretexts.org/Bookshelves/Linear_Algebra/Book:_Linear_Algebra_(Schilling_Nachtergaele_and_Lankham)/11:_The_Spectral_Theorem_for_normal_linear_maps/11.05:_Positive_operators
疑難雜症萬事通
在網路上遇到任何問題都可以在這邊找找看唷

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您即將離開本站

並前往 https://math.libretexts.org/Bookshelves/Linear_Algebra/Book%3A_Linear_Algebra_(Schilling_Nachtergaele_and_Lankham)/11%3A_The_Spectral_Theorem_for_normal_linear_maps/11.05%3A_Positive_operators

是否確定要離開？