The Euler's function ø(m) counts the number of integers a with 0 < a < m and gcd(a, m) = 1. (i) Let m = pª where p is prime. Show that (m) = m(1 – 1/p). (ii) Let m = pa and n = gb where p and q are distinct primes. Show that $(mn) = ¢(m)ø(n).
The Euler's function ø(m) counts the number of integers a with 0 < a < m and gcd(a, m) = 1. (i) Let m = pª where p is prime. Show that (m) = m(1 – 1/p). (ii) Let m = pa and n = gb where p and q are distinct primes. Show that $(mn) = ¢(m)ø(n).
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Transcribed Image Text:The Euler's function (m) counts the number of integers a with 0 < a < m and
gcd(a, m) = 1.
(i) Let m = p° where p is prime. Show that o(m) = m(1 – 1/p).
(ii) Let m =
pa and n =
gb where p and q are distinct primes. Show that
$(mn) = ¢(m)ø(n).
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