The Greeks according to official history used letters for hundreds, for tens, and ones.It was extremely complicated. If you talk about Archimedes, you should use Greek letters.

I would not draw definitive conclusions from that. If we look at South and North Korea, it is pretty hard to believe that we're dealing with the same people. Half of the people are forced to live in a concentration camp; the other have created one of the most dynamic economies in the world.

Most likely, the system of mutual relations that has evolved in Eastern Europe and Asia corresponds to another level of governance.

Vladimir Putin is the bigger danger than Donald Trump because Trump can be dealt with within American democracy. There is an independent judiciary. He cannot overrule American courts. He will have to play by some rules. He will do damage certainly, but to do real damage I think he is too weak. Putin is aggressive wherever he can be. In Europe, in Germany, Putin will not stop.

Many Republicans who traditionally were for a positive role in the world, anti-Russian, now they want to defend their party and leader, and they don't care about real arguments. The paradox is the Democrats were so timid in criticising Vladimir Putin. Barack Obama appeased him and now they are criticising Putin's interference in American democracy. It is a strange reversal of the roles.

Thanks to the Polgars the adjective 'men's' before events and the 'affirmative action' women's titles such as Woman Grandmaster have become anachronisms.

Donald Trump envies anyone who can do things he can't.