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August 14th, 2018, 01:52 AM  #1 
Newbie Joined: Aug 2018 From: czech repiblic Posts: 1 Thanks: 1  what this operator stands for ?
Hello, can't find this operator on wikipedia. It has < on top and under it is _ Thanks. 
August 14th, 2018, 01:53 AM  #2 
Senior Member Joined: Feb 2016 From: Australia Posts: 1,770 Thanks: 627 Math Focus: Yet to find out. 
You mean this: $\le$? edit: It stands for "less than or equal to" by the way. Last edited by Joppy; August 14th, 2018 at 02:43 AM. 
August 15th, 2018, 12:40 AM  #3 
Global Moderator Joined: Dec 2006 Posts: 20,388 Thanks: 2015  It is included in this list of mathematical symbols. The symbol $\leqslant$ is also in use and has the same meaning. 

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