<<They certainly know but they have to learn algebra at school!>>

And in virtue of which miracle __simple algebra__ makes someone "the biggest mathematician", and differential calculus, or integral calculus, or linear algebra, can't? I for one I did study math. a bit and I remember being astonished by the genius of those developping such method as those in differental and integral calculus (not taking into account the fact that, e.g., newton conceived all this trings before being 22 years old!). But I never found something to wonder in simple algebra! That dosen't mean that simple algebra doesn't require geniality to invent it: I just did wonder how otherwise than by ethnic or religious bias, those that made a muslim mathematician "the biggest" could reach such a verdict; in the last 4 centuries it was made a big, very big progress, but some people here remember, selectively, this "xxx", that knew only how to group algebraic terms...

You'll say now that without this knowledge, newton could not invent his differential calculus, but in this case I'll tell you that before "muslim" mathematicians were greek, egyptian and mazdaist, or sumerian mathematicians. My point is that if we can speak about "the biggest mathematicians of one certain century", or of "big mathematician**s** of the whole history", to make hierarchies of all mathematicians is always unjust.

<<I don't know what you mean, for example I think Leibniz was a German mathematician (from Leipzig in Germany), however he wrote primarily in Latin and French, don't you think so?>>

My question was about those making here contributions on this topic; it was a reply to your not-so-convincing assertion that here are writing (and voting) just one or 2 middle-easterners.