Element

可用

Test or assert membership of an expression in a mathematical domain.

形式

Element[x, dom]

Element[x, reg]

Element[x1 | x2 | …, dom]

Element[patt, dom]

验证过的示例Element[5, Reals] → True

在 Qurak 上运行搜索参考

用于

Refine and simplify expressions - 5 步

主题

Assumptions And Domains - Domains
Formula Manipulation - Formula Testing
Geometric Properties And Measures - Membership Predicates
Number Recognition - General
Number Theory - Diophantine & Other Equations »
Operations On Sets - Testing Elements in Sets

相关

Simplify MemberQ IntegerQ Assumptions Condition PatternTest Equal Less Divisible CoprimeQ Booleans Primes

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