open sentence

open sentence

noun
1.
Mathematics. an equation or inequality containing one or more variables in which its truth or falsehood depends upon the values assumed by the variables in a particular instance, as the equation x + 3 = 8.
2.
Logic. a propositional function that contains a free variable, as “x is a man.”

Origin:
1935–40
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Open sentence is always a great word to know.
So is proportional. Does it mean:
two quantities having the same or a constant ratio or relation
quantity; number represented by a figure or symbol, a point in the range of a function
Collins
World English Dictionary
open sentence
 
n
logic propositional function, Also called: sentential function an expression containing a free variable that can be replaced by a name to yield a sentence, as x is wise

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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