Mystery Symbol: What Does a Big Inverted V Mean?

  • Context: Graduate 
  • Thread starter Thread starter EvLer
  • Start date Start date
  • Tags Tags
    Mean Mystery Symbol
Join the discussion
Registration is free. Ask a follow-up in this thread, or start your own.
3 replies · 3K views
EvLer
Messages
454
Reaction score
0
what does a big inverted V stand for? it's not "and" because it's used right in front of a literal (atomic formula) not sure if it's a quantifier... This is a paper discussing approach based on deontic logic that I am scanning through, but this sign i cannot figure out how to search online...
Does anybody know?
 
Physics news on Phys.org
EvLer said:
what does a big inverted V stand for? it's not "and" because it's used right in front of a literal (atomic formula) not sure if it's a quantifier... This is a paper discussing approach based on deontic logic that I am scanning through, but this sign i cannot figure out how to search online...
Does anybody know?

It means "or." http://en.wikipedia.org/wiki/Logical_disjunction
 
I understand a 'V' followed by a variable followed by a symbolic formula as an existential generalization and an 'inverted V' followed by a variable followed by a symbolic formula as a universal generalization. These symbols have to do with quantification.
 
well, no it is not a disjunction, that is why I said I was asking, plus it is INVERTED ... sounds more like it is a relation, although i think in certain other cases it is used like a "sigma"-notation, i.e. from 1 to n "and" certain literals together to form a formula. I guess i should have posted an image of it for clarity.
thanks though...
EDIT:
ok, I will post the image