Universal Inclusion of Prescribed Primes in 3x3 Magic Squares
David Salas, Eloy Tim\'on, Pepa Montero, Miguel Le\'on P\'erez, Rub\'en Gonz\'alez Mart\'inez

TL;DR
This paper proves that for any prime q0 ≥ 5, there exists a 3x3 magic square with distinct positive primes including q0, correcting previous gaps and unifying notation and methods.
Contribution
The authors provide an integrated, corrected proof that every prescribed prime q0 ≥ 5 appears in some 3x3 prime magic square, addressing previous logical gaps and standardizing notation.
Findings
Confirmed existence of prime-containing 3x3 magic squares for all q0 ≥ 5
Unified notation and methodology for the proof
Closed the logical gaps in previous versions
Abstract
We present an integrated version of the global program proving that every prescribed prime \(q_0\ge 5\) occurs in some \(3\times 3\) magic square whose nine entries are distinct positive primes. The manuscript explicitly corrects the four points that had prevented the previous version from being regarded as closed: (i) the notation for the fixed prime \(q_0\) is now kept uniformly distinct from the notation for the sieve moduli \(d\); (ii) the weight convention is unified by working with the function \(\vt(n)=\log n\) on the primes and \(0\) off the primes, while \(\Lambda\) is used only inside the analytic estimates where it is the natural variable; (iii) the full residual notation \((W,a_W,b_W,S_1,A_d,g(d))\) has been incorporated throughout the manuscript; and (iv) the final closure is replaced by a residual-completion theorem on the \emph{common support of the core}, thereby…
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