.
A perfect answer. Thanks.
Meanwhile, I found that my favorite number (48397) is a prime number and the next two primes (48407 and 48409) are twin primes.
a^2 – b^2 = (a-b)(a+b) = 48397
For: a – b = 1 →
a + b = 2a – 1 = 48397 →
a = 48398/2 = 24199, b = a – 1 = 24198
Injectivity of f and g.
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