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What does this notation mean?by shadowboy13
Tags: notation 
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#1
Jan1314, 06:20 AM

P: 19

[a;b[
I want to do a problem with this but i can't find anything about it, if anyone can help me it'd be very useful, thank you. :) The one i want to do exactly is [20;30[ , in case anyone is wondering. 


#2
Jan1314, 08:06 AM

P: 949

Google says...
http://en.wikipedia.org/wiki/ISO_3111#Sets The endpoint of an open interval can be expressed with an outwardfacing square bracket which is synonymous with an inwardfacing parenthesis. 


#3
Jan1314, 01:32 PM

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P: 21,280

In other words, [20;30[ means {x  20 ≤ x < 30}, the interval on the real number line between 20 and 30, with 20 included and 30 excluded.



#4
Jan1414, 08:12 AM

Math
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Thanks
PF Gold
P: 39,533

What does this notation mean?
Perhaps you are familiar with [20, 30), another notation meaning the same thing all numbers between 20 and 30, including 20 but not 30.



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