is_nonnegative_integer_equivalent_number

abjad.mathtools.is_nonnegative_integer_equivalent_number.is_nonnegative_integer_equivalent_number(argument)

Is true when argument is a nonnegative integer-equivalent number.

>>> duration = abjad.Duration(4, 2)
>>> abjad.mathtools.is_nonnegative_integer_equivalent_number(duration)
True

Returns true or false.