%0 Journal Article %T A Derivation of $pi(n)$ Based on a Stability Analysis of the Riemann-Zeta Function %A Harney M. %A Haranas I. I. %J Progress in Physics %D 2010 %I HEXIS (Arizona) %X The prime-number counting function $pi(n)$, which is significant in the prime number theorem, is derived by analyzing the region of convergence of the real-part of the Riemann-Zeta function using the unilateral $z$-transform. In order to satisfy the stability criteria of the $z$-transform, it is found that the real part of the Riemann-Zeta function must converge to the prime-counting function. %K Riemann-zeta function %K prime numbers %K stability analysis %U http://ptep-online.com/index_files/2010/PP-21-12.PDF