Density ternary Goldbach for primes in a fixed residue class
<jats:p> We prove that if <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>A</mml:mi> </mml:math> is a subset of those primes which are congruent to <mml:math xmlns:mml="http://www....