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This thermometer is indicating a negative Fahrenheit temperature (−4 °F). In mathematics, a negative number is the opposite of a positive real number. [1] Equivalently, a negative number is a real number that is less than zero. Negative numbers are often used to represent the magnitude of a loss or deficiency.
The less-than sign is a mathematical symbol that denotes an inequality between two values. The widely adopted form of two equal-length strokes connecting in an acute angle at the left, <, has been found in documents dated as far back as the 1560s.
A number is non-negative if it is greater than or equal to zero. A number is non-positive if it is less than or equal to zero. When 0 is said to be both positive and negative, [citation needed] modified phrases are used to refer to the sign of a number: A number is strictly positive if it is greater than zero. A number is strictly negative if ...
In logic, negation, also called the logical not or logical complement, is an operation that takes a proposition to another proposition "not ", written , , ...
The symbol is used to denote negation. For example, if P(x) is the predicate "x is greater than 0 and less than 1", then, for a domain of discourse X of all natural numbers, the existential quantification "There exists a natural number x which is greater than 0 and less than 1" can be symbolically stated as:
More generally, the logic that permits conjunctions or disjunctions with less than κ constituents is known as L κω. For example, L ω 1 ω permits countable conjunctions and disjunctions. The set of free variables in a formula of L κω can have any cardinality strictly less than κ, yet only finitely many of them can be in the scope of any ...
Nowadays, there seems to be a Facebook group for everything: crocheting, books, cooking, circus, you name it—it’s been covered. But some are far less specific than the aforementioned examples.
Negative numbers: Real numbers that are less than zero. Because zero itself has no sign, neither the positive numbers nor the negative numbers include zero. When zero is a possibility, the following terms are often used: Non-negative numbers: Real numbers that are greater than or equal to zero. Thus a non-negative number is either zero or positive.