"TBD" redirects here. For the aircraft, see TBD Devastator.
The phrase "to be determined" is used to label variables whose value is not yet known (for example, dates, times, or design details). It is frequently shortened to TBD in written correspondence. TBD from Torpedo Eight taxiing up the flight deck of CV-8 circa 15 May 1942. ...
The phrase "to be announced" is similar in nature, though that which is to be announced may have actually been determined, but not made public. In many cases, however, the phrases are used interchangeably.
For movies, the phrase "coming soon" is used in place of "TBD" or "TBA". This implies that the only widely known information about the movie is the title and when it comes out (either the year or the season and year, but never the date). This article or section is in need of attention from an expert on the subject. ...
Determinants are used to characterize invertible matrices (namely as those matrices, and only those matrices, with non-zero determinants), and to explicitly describe the solution to a system of linear equations with Cramer's rule.
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