Digit-Shifting Constants
المؤلف:
المرجع الالكتروني للمعلوماتيه
المصدر:
المرجع الالكتروني للمعلوماتيه
الجزء والصفحة:
...
23-2-2020
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Digit-Shifting Constants
Given a real number
, find the powers of a base
that will shift the digits of
a number of places
to the left. This is equivalent to solving
 |
(1)
|
or
 |
(2)
|
The solution is given by
 |
(3)
|
where
is the Lambert W-function.

The above plot shows
for
and small values of
. As can be seen, there are two distinct solutions, corresponding to two different branches of
in (3). For
, 2, ..., these solutions are approximately given by 0.137129, 0.0102386, 0.00100231, 0.000100023, 0.0000100002, ..., and 1, 2.37581, 3.55026, 4.66925, 5.76046, ..., respectively. For example,
 |
(4)
|
and
 |
(5)
|
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