在数学中，Im指复数的虚部，与Re指代的实部共同组成一个复数。 如复数z=2+3i，则Im（z）=3，Re（z）=2。 在高等数学中，Im指“象”。

In mathematics, a complex number is an element of a number system that extends the real numbers with a specific element denoted i, called the imaginary unit and satisfying the …

2011年10月7日 · If a complex number $z$ is written as $z = a + bi$, then Re$(z) = a$ and Im$(z) = b$. (At risk of stating the obvious, "Re" stands for "Real" and "Im" stands for "Imaginary".) If …

Re [expr] is left unevaluated if expr is not a numeric quantity. Re automatically threads over lists. Re can be used with Interval and CenteredInterval objects.

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