If and Only If - More General Usage

More General Usage

Iff is used outside the field of logic, wherever logic is applied, especially in mathematical discussions. It has the same meaning as above: it is an abbreviation for if and only if, indicating that one statement is both necessary and sufficient for the other. This is an example of mathematical jargon. (However, as noted above, if, rather than iff, is more often used in statements of definition.)

The elements of X are all and only the elements of Y is used to mean: "for any z in the domain of discourse, z is in X if and only if z is in Y."

Read more about this topic:  If And Only If

Other articles related to "general":

1962 - Events - November
... November 6 – Apartheid The United Nations General Assembly passes a resolution condemning South Africa's racist apartheid policies, and calls for all UN member states ... November 30 – The United Nations General Assembly elects U Thant of Burma as the new UN Secretary-General ...
33rd Infantry Division (Wehrmacht) - Commanders
... Ritter von Speck April 29, 1940 Generalleutnant Rudolf Sintzenich November 1, 1940 General Friedrich Kühn March 22, 1941 Generalleutnant Heinrich ...
Janet Reno - Attorney General
... nominated and confirmed as the first woman to serve as the United States Attorney General ... Reno remained Attorney General for the rest of Clinton's presidency, making her the longest-serving Attorney General since William Wirt in 1829 ...
Janet Reno
... Reno (born July 21, 1938), served as the Attorney General of the United States, from 1993 to 2001 ... She was the first woman to serve as Attorney General and the second longest serving Attorney General after William Wirt ...

Famous quotes containing the words usage and/or general:

    ...Often the accurate answer to a usage question begins, “It depends.” And what it depends on most often is where you are, who you are, who your listeners or readers are, and what your purpose in speaking or writing is.
    Kenneth G. Wilson (b. 1923)

    We have grown literally afraid to be poor. We despise anyone who elects to be poor in order to simplify and save his inner life. If he does not join the general scramble and pant with the money-making street, we deem him spiritless and lacking in ambition.
    William James (1842–1910)