'Real elements matrix predicate.
``Q.real_elements(x)`` is true iff all the elements of ``x``
are real numbers.
Examples
>>> from sympy import Q, ask, MatrixSymbol
>>> X = MatrixSymbol(\'X\', 4, 4)
>>> ask(Q.real(X[1, 2]), Q.real_elements(X))
True'

@predicate_memo
def real_elements(self):

    return Predicate('real_elements')
