Martin Heidegger and Omar Khayyam on the Question of “Thereness” (Dasein). M. Aminrazavi.
In: Islamic philosophy and occidental phenomenology on the perennial microcosm and macrocosm. Dordrecht, Springer, 2006. Vol. 2, pp. 277-287.

In comparing two philosophers who belong to two distinct philosophical traditions, one often runs the risk of superficiality. That is, by finding similarities, either conceptual or linguistic, one may conclude that the thinkers in question are advocating the same concepts. One may go further and ask, “So what if the two figures belonging to two different schools of thought agree with respect to one or a set of ideas?”