3.39. Recall that for any a e F;, the discrete logarithm of a (with respect to a primitive root g) is a number log, (a) satisfying glosg(a) = a (mod p). Prove that =(-1)lo8,(a) for all a E F;. Thus quadratic reciprocity gives a fast method to compute the parity of log, (a).

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter5: Inverse, Exponential, And Logarithmic Functions
Section5.6: Exponential And Logarithmic Equations
Problem 27E
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3.39. Recall that for any a E F;, the discrete logarithm of a (with respect to a
primitive root g) is a number log,(a) satisfying
glogg(a) = a (mod p).
Prove that
(-1)l0%,(a)
for all a E F;.
Thus quadratic reciprocity gives a fast method to compute the parity of log, (a).
Transcribed Image Text:3.39. Recall that for any a E F;, the discrete logarithm of a (with respect to a primitive root g) is a number log,(a) satisfying glogg(a) = a (mod p). Prove that (-1)l0%,(a) for all a E F;. Thus quadratic reciprocity gives a fast method to compute the parity of log, (a).
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