This has some of them:
http://en.wikipedia.org/wiki/Table_of_logic_symbols
∈ – contained within a set
∉ – not contained within a set.

I think most of this stuff is set theory which should be covered in discrete math course at MSU. Last time I checked it is a required undergrad course so you will probably see these soon :mrgreen:

∃ – means there exists:

∃ students ∈ blogger – there exists at least one member of the set students which also belongs to the set blogger

∀ – means for all:

∀ students ∈ people- al the members of the set students are also in the set people

∩ – intersection – the intersection of two sets is their common part

so what the heck do all the funny upside-down letters mean?
y’know what, dont answer that :P

aww.. so much maths stuff i havent learned yet and will probably have to at some point *whimper*

LOL, surreal! You can’t make stuff like that up… hehehe… v.funny.

All I said was that the intersection of the sets emo blogger and LJ user is larger than the intersection between emo blogger and not LJ user. So yes the following are also true:

∀ lj user ∈ blogger (all LJ users are bloggers)
∃ emo ∈ (blogger ∩ ¬ lj user) (there are emo kids who are bloggers but not LJ users)

Neither of these invalidates my previous statements. :)

ahhh discrete math *jumps behind rock*

if you were to look it at that, you can say that lj user is contained within the set of bloggers. therefore, there are emo bloggers out side of lj. you haven’t even commented about the lj forks yet. *tisk tisk*

Yeah, not every LJ user is emo. ( ∃ lj user ∉ emo )

Not every emo kid is a LJ user. ( ∃ emo ∉ lj user )

But, I think this holds true:

emo blogger ∩ lj user > emo blogger ∩ ¬ lj user

Why confine yourself to 1 medium when you can spread your emo annoyance through several mediums.

reminder, not ever lj user is emo. apparently some are your everyday geek, while others are spree shooters. http://weise.livejournal.com/ (Jeffrey Weise)

Darn, I really moap better. Seriously. Funny story as well.

Yes.

Thanks.