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Mathematics 11 Online
OpenStudy (hang254):

What is <=> called in a truth table?

OpenStudy (hang254):

@Hero

OpenStudy (hang254):

is it not and?

hero (hero):

<--> means if and only if

hero (hero):

There's another name for it, but I forget

OpenStudy (hang254):

ok, thank you

hero (hero):

Actually <--> means if and only iff <=> means identical truth table

OpenStudy (phi):

it is also exclusive nor XNOR http://en.wikipedia.org/wiki/Truth_table#Logical_equality

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