Uniqueness quantification
Logical property of being the one and only object satisfying a condition / From Wikipedia, the free encyclopedia
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"Unique (mathematics)" redirects here. For other uses, see Unique (disambiguation).
In mathematics and logic, the term "uniqueness" refers to the property of being the one and only object satisfying a certain condition.[1] This sort of quantification is known as uniqueness quantification or unique existential quantification, and is often denoted with the symbols "∃!"[2] or "∃=1". For example, the formal statement
This article includes a list of general references, but it lacks sufficient corresponding inline citations. (January 2013) |
may be read as "there is exactly one natural number such that ".