New in version 2.5.
True when expr is a sequence comprising zero or more numbers, all of which are relatively prime:
abjad> from abjad.tools import mathtools
abjad> mathtools.are_relatively_prime([13, 14, 15])
True
Otherwise false:
abjad> mathtools.are_relatively_prime([13, 14, 15, 16])
False
Note that function returns true when expr is an empty sequence:
abjad> mathtools.are_relatively_prime([])
True
Function returns false when expr is nonsensical type:
abjad> mathtools.are_relatively_prime('foo')
False
Return boolean.