The term "existence" is a good example of how something familiar can take on a slightly different technical meaning in a mathematical context. If a book exists, for example, it has been written, and usually published. There is a physical manifestation...

Existence Philosophical discussion of the notion of existence, or being, has centered on two main problems that have not always been very clearly distinguished. First, there is the problem of what we are to say about the existence of fictitious...

Existence is what is asserted by the verb 'exist' (derived from the Latin word 'existere', meaning to appear or emerge or stand out). The word 'exist' is certainly a grammatical predicate, but philosophers have long disputed whether it is also a logical...

Sales of existing homes, depressed by turmoil in credit markets, fell for a sixth straight month in August, pushing activity to the lowest point in five years.The National Association of Realtors said that sales of existing single-family homes dropped by 4.3 percent in August, compared...

Sales of existing homes rose in February by the largest amount in nearly three years, but worsening troubles in subprime mortgages were viewed as a roadblock to a full-fledged rebound.The National Association of Realtors reported Friday that existing home sales climbed 3.9 percent last month,...

Sales of existing homes fell in December, closing out a year in which demand for homes slumped by the largest amount in 17 years.The National Association of Realtors reported that sales of existing homes were down 0.8 percent last month, a bigger decline than had...

Sales of existing homes plunged in March by the largest amount in 18 years, reflecting in part rising troubles in the subprime mortgage market.Analysts cautioned that tougher approval standards by lenders in response to the increase in mortgage delinquencies will depress sales further in coming...