document.write("« A Homological Definition for the Tate--Shafarevich Group of a Pell Conic. (arXiv:1712.08251v1 [math.NT])");document.write(" | ");document.write("A Potapov-type approach to a truncated matricial Stieltjes-type power moment problem. (arXiv:1712.08358v1 [math.CA]) »");