1. May 5, 2009 #1

   skittlez15

   1

   what does the upside down T mean

    
2. 
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3. May 5, 2009 #2

   berkeman

   42,911

   Staff: Mentor

   Re: Math
   
   

   Welcome to the PF. Can you post a link to an example of the character? What context is it used in?

    
4. May 6, 2009 #3

   Redbelly98

   12,020

   Staff Emeritus

   Science Advisor

   Homework Helper

   Re: Math
   
   

   In geometry, it means "is perpendicular to".

    

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