How the Superposition of the Periodic Pulsations of +1 and -1 Generates Values of the Mertens Function

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The Möbius function is defined for positive integers by
,
, where
is the number of prime factors of
if
is square-free, and
if
is not square-free (a number is square-free if its prime decomposition contains no repeated factors). The Mertens function
is the cumulative sum of the Möbius function
,
. For all positive integers
and
with
, build the table
, where the resulting multiplication sign (≠0) indicates to add a pulse (+1) or subtract a pulse (-1), while the resulting absolute value (≠0)
gives the period of pulsation (the gap along the axis of real numbers between consecutive pulses). Each pulsation of +1 and -1 for a particular combination of
begins from the first integer number divisible by
in the interval
if
or
if
and goes on through the period
within the interval. The function
is the superposition of the periodic pulsations of +1 and -1 for all combinations of
in the green area of the table with corresponding period determined by the table. 0 in the table signifies that the corresponding combinations of
do not contribute in
. The initial value
is 2. The table shows all available pulsations for specific
that can be involved in the calculation of the
function (green and yellow areas in the table). The green area shows pulsations actually involved in the calculation of the
function. By manipulating indices
and
we can expand or narrow the green area. Index
indicates the maximum rank of the green area while index
is the parameter of the completion of this area until a perfect square (
,
). When all available pulsations are involved in the calculation of the
function (no yellow area in the table), we will get for
exactly the values of the Mertens function
.
Contributed by: R. M. Abrarov and S. M. Abrarov (March 2011)
Open content licensed under CC BY-NC-SA
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Reference:
R. M. Abrarov and S. M. Abrarov, "Formulas for Positive, Negative and Zero Values of the Möbius Function," arXiv, 2009.