>>> from singular import aprop

---- inici

>>> a = aprop(0.02, 1e-3, 2)
>>> a
'0.019\t0.02\t0.021\n-0.26\t-0.26\t-0.26'
>>> print(a) # doctest: +NORMALIZE_WHITESPACE
0.019	0.02	0.021
-0.26	-0.26	-0.26

>>> a = aprop(0.02, 1e-3, 5)
>>> a
'0.019\t0.02\t0.021\n-0.25715\t-0.26078\t-0.26434'
>>> print(a) # doctest: +NORMALIZE_WHITESPACE
0.019	0.02	0.021
-0.25715	-0.26078	-0.26434

>>> a = aprop(0.02, 1e-5, 5)
>>> a
'0.01999\t0.02\t0.02001\n-0.26075\t-0.26078\t-0.26082'
>>> print(a) # doctest: +NORMALIZE_WHITESPACE
0.01999	0.02	0.02001
-0.26075	-0.26078	-0.26082

>>> a = aprop(1, 1e-5, 3)
>>> a
'0.99999\t1\t1.00001\n-171827.605\t0\t171828.76'
>>> print(a) # doctest: +NORMALIZE_WHITESPACE
0.99999	1	1.00001
-171827.605	0	171828.76

>>> a = aprop(1, 1e-3, 3)
>>> a
'0.999\t1\t1.001\n-1717.702\t0\t1718.857'
>>> print(a) # doctest: +NORMALIZE_WHITESPACE
0.999	1	1.001
-1717.702	0	1718.857

---- fi

>>> a = aprop(2, 1e-3, 3)
>>> a
'1.999\t2\t2.001\n-0.875\t-0.881\t-0.887'
>>> print(a) # doctest: +NORMALIZE_WHITESPACE
1.999	2	2.001
-0.875	-0.881	-0.887
>>> a = aprop(20, 1e-3, 3)
>>> a
'19.999\t20\t20.001\n161790280.096\t161949450.454\t162108777.583'
>>> print(a) # doctest: +NORMALIZE_WHITESPACE
19.999	20	20.001
161790280.096	161949450.454	162108777.583