, or null, if the
if the gradient
null, if still the
is undefined if q
. If d is zero, then
ASSERT (FUN) ¶ FUNCTION ASSERT : BOOL If the input b is
(negative or NaN), or if
: only safe if the
Errors.library): ERR_PARAMETER if h [...] _NOTINITIALIZED if the packet is [...] _PENDING if no value is