Determines the equality of two numbers by comparing to zero, or using the
epsilon value
# File ext/bigdecimal/lib/bigdecimal/jacobian.rb, line 28
def isEqual(a,b,zero=0.0,e=1.0e-8)
aa = a.abs
bb = b.abs
if aa == zero && bb == zero then
true
else
if ((a-b)/(aa+bb)).abs < e then
true
else
false
end
end
end