This author is a mathematician.
Based both on his occupation, and the evidence of this article, he knows diddly squat about politics.
Therefore, all of his references to "left" and "right" should be ignored, exactly as one of the proverbial monkeys should be ignored, when he typed out the opening lines of "Hamlet."
Quod Erat Demonstrum, or in its short form, Q.E.D.
Congressman Billybob
That source does not quite qualify as a srandard of measurement of something else, like the standard meter or the atomic clock, now does it? All the author is demonstrating is that he has the standard academic political bias, while writing on a totally different subject. Does he believe that if he shows he's "on the correct wave length" that his academic colleagues will cut him some slack on the legitimacy of the discussions of mathematics. Could that be what's going on here?
John / Billybob