o
    à8Va  ã                   @   sH   d dl mZ d dlmZmZ d dlmZ d dlmZ G dd„ deƒZ	dS )é    )ÚS)ÚEqÚNe)ÚBooleanFunction)Ú	func_namec                   @   s0   e Zd ZdZedd„ ƒZedd„ ƒZdd„ ZdS )	ÚContainsa×  
    Asserts that x is an element of the set S.

    Examples
    ========

    >>> from sympy import Symbol, Integer, S
    >>> from sympy.sets.contains import Contains
    >>> Contains(Integer(2), S.Integers)
    True
    >>> Contains(Integer(-2), S.Naturals)
    False
    >>> i = Symbol('i', integer=True)
    >>> Contains(i, S.Naturals)
    Contains(i, Naturals)

    References
    ==========

    .. [1] https://en.wikipedia.org/wiki/Element_%28mathematics%29
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