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what does this symbol mean in math?
http://i45.tinypic.com/35k200h.jpg
 one year ago
 one year ago
what does this symbol mean in math? http://i45.tinypic.com/35k200h.jpg
 one year ago
 one year ago

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tomikoBest ResponseYou've already chosen the best response.0
the V and the other one turned upside down? ?
 one year ago

RudyBest ResponseYou've already chosen the best response.0
The way I've seen it used,V means union of sets and upside down triangle means intersection of sets.
 one year ago

tomikoBest ResponseYou've already chosen the best response.0
apparently there's a DIFFERENT meaning :
 one year ago

tomikoBest ResponseYou've already chosen the best response.0
OK i'm leaning this: http://i47.tinypic.com/dxhdm8.jpg. the text means. Set X C R is lowerbounded if:....then that image i posted earlier. in this context what do the V and upside V mean?
 one year ago

UnkleRhaukusBest ResponseYou've already chosen the best response.1
\[\Large\bigvee_{m\in \mathbb R}\bigwedge_{x\in X}x\geq m\] \(x\) is greater than or equal to \(m\) , OR \(m\) is an element of the real numbers , And \(x\) is in the set \(X\) .
 one year ago

UnkleRhaukusBest ResponseYou've already chosen the best response.1
\(\land\) and \(\lor\) or
 one year ago

UnkleRhaukusBest ResponseYou've already chosen the best response.1
\[X\subset\mathbb R\] the set \(X\) is a subset of the real numbers
 one year ago

UnkleRhaukusBest ResponseYou've already chosen the best response.1
@Rudy \(A\cup B\) is the union of sets \(A, B\) \(A\cap B\) is the intersection
 one year ago

chihiroasleafBest ResponseYou've already chosen the best response.2
@tomiko I don't understand the language, but it seems 'real analysis' and I guess that it supposed to be, Set \[X \subset R\] is bounded from below, or have a lower bound if \[\forall m \in R, \exists x \in X, x \ge m\] we can say that, for all m in R, there exist x in X such that x greater than or equal to m, that's the usual symbol that I know... :)
 one year ago

tomikoBest ResponseYou've already chosen the best response.0
@chihiroasleaf exactly what i wanted!! thank to @UnkleRhaukus too!!
 one year ago

chihiroasleafBest ResponseYou've already chosen the best response.2
but I think, \[X \subset R\] is said to have a lower bound if \[\exists m \in R,\] such that \[\forall x \in R \rightarrow x \ge m \]
 one year ago

UnkleRhaukusBest ResponseYou've already chosen the best response.1
the fancy names are conjunctions (and) , disjunction (or)
 one year ago

chihiroasleafBest ResponseYou've already chosen the best response.2
yes.., they usually use for logic, it's my first time see these symbol use in this subject... :D
 one year ago

tomikoBest ResponseYou've already chosen the best response.0
but this is NOT logic. i know what they mean in logic. usually the in logic the "v" i smaller. but this one the "V" is very big and under it they write something like x is a member of R. this is definitely not logic.
 one year ago

chihiroasleafBest ResponseYou've already chosen the best response.2
yes.., that's why I say that it's my first time see these symbol are used in this subject, but the definition is a bit different to what I know, may be you can read on this link about upper and lower bound of a set... If I refer to the usual definition of upper and lower bound than, V will mean 'there exist' and '^' will mean 'for all' http://www.emathzone.com/tutorials/realanalysis/upperandlowerbounds.html
 one year ago

chihiroasleafBest ResponseYou've already chosen the best response.2
so, your image will mean \[\exists m \in R, \forall x \in X, x \ge m\] it will make sense if, we are talking about lower bound... sorry for the mistake...
 one year ago
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