Comment

The comentor notes that Dr. Fialkow has solved a difficult problem in disproving the so-called series-parallel conjecture, which he published some twelve years ago. He is not particularly surprised that the conjecture turns out to be false. However, he is surprised that Dr. Fialkow??s counterexample has the following combination of particular characteristics: Y11 = Y22, compact residues, negative residues at both finite poles of Y12.