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2. Set-builder notation - Wikipedia

   en.wikipedia.org/wiki/Set-builder_notation

   Set-builder notation can be used to describe a set that is defined by a predicate, that is, a logical formula that evaluates to true for an element of the set, and false otherwise. [2] In this form, set-builder notation has three parts: a variable, a colon or vertical bar separator, and a predicate. Thus there is a variable on the left of the ...

3. Intersection (set theory) - Wikipedia

   en.wikipedia.org/wiki/Intersection_(set_theory)

   So the intersection of the empty family should be the universal set (the identity element for the operation of intersection), [4] but in standard set theory, the universal set does not exist. However, when restricted to the context of subsets of a given fixed set X {\displaystyle X} , the notion of the intersection of an empty collection of ...

4. Naive set theory - Wikipedia

   en.wikipedia.org/wiki/Naive_set_theory

   This notation is called set-builder notation (or "set comprehension", particularly in the context of Functional programming). Some variants of set builder notation are: {x ∈ A | P(x)} denotes the set of all x that are already members of A such that the condition P holds for x. For example, if Z is the set of integers, then {x ∈ Z | x is ...

5. List comprehension - Wikipedia

   en.wikipedia.org/wiki/List_comprehension

   Here, the list [0..] represents , x^2>3 represents the predicate, and 2*x represents the output expression.. List comprehensions give results in a defined order (unlike the members of sets); and list comprehensions may generate the members of a list in order, rather than produce the entirety of the list thus allowing, for example, the previous Haskell definition of the members of an infinite list.

6. Symmetric difference - Wikipedia

   en.wikipedia.org/wiki/Symmetric_difference

   In mathematics, the symmetric difference of two sets, also known as the disjunctive union and set sum, is the set of elements which are in either of the sets, but not in their intersection. For example, the symmetric difference of the sets { 1 , 2 , 3 } {\displaystyle \{1,2,3\}} and { 3 , 4 } {\displaystyle \{3,4\}} is { 1 , 2 , 4 ...

7. Constructive set theory - Wikipedia

   en.wikipedia.org/wiki/Constructive_set_theory

   But classical set theories will generally claim that holds also other functions than the computable ones. For example there is a proof in that total functions (in the set theory sense) do exist that cannot be captured by a Turing machine. Taking the computable world seriously as ontology, a prime example of an anti-classical conception related ...

8. Predicate (mathematical logic) - Wikipedia

   en.wikipedia.org/wiki/Predicate_(mathematical_logic)

   Set-builder notation makes use of predicates to define sets. In autoepistemic logic , which rejects the law of excluded middle, predicates may be true, false, or simply unknown . In particular, a given collection of facts may be insufficient to determine the truth or falsehood of a predicate.

9. List of set identities and relations - Wikipedia

   en.wikipedia.org/wiki/List_of_set_identities_and...

   Universe set and complement notation The notation L ∁ = def X ∖ L . {\displaystyle L^{\complement }~{\stackrel {\scriptscriptstyle {\text{def}}}{=}}~X\setminus L.} may be used if L {\displaystyle L} is a subset of some set X {\displaystyle X} that is understood (say from context, or because it is clearly stated what the superset X ...