The Method of Bisection is a sophisticated version of a tool used in fifth grade called "Guess and Check".

Looking more deeply at the emergence of ISIS or the chaos that exists in Syria, Yemen and Libya would clearly raise crucial doubts about reliance on military intervention and drone warfare as adequate counterterrorist responses and would call attention to the detrimental effects of US "special relationships" with Israel and Saudi Arabia.

It may be that there is so much ambiguity and ideology attached to the term 'terrorism' that it is best to avoid its use altogether, as it is likely to be twisted in public discourse to demonise the enemies of the established order, while exempting state violence from legal and moral scrutiny.

When Daniel Gorenstein was chair, he did mathematics from 5am to 12noon, spending the second half of his working day on administration. When I was chair, I also spent half of my time on research: every other minute.

This kind of totalization of security consciousness [after tragedy of 9/11] has the effect within classrooms (and beyond) of constraining the imagination and reinforcing attitudes that privilege the forces of law and order as against the crosscurrents of freedom and dissent.

To achieve effectiveness and legitimacy it is time to scrap the right of veto given to permanent members of the UN, or at least severely restrict its use. It is also time to either abandon the idea of permanent membership or broaden it to reflect the rise of non-Western states to the status of global leaders (e.g. Brazil, India, Indonesia, Turkey, South Africa), and to downgrade European representation by either giving the European Union a single seat or rotating a European state among Germany, France, UK, and Italy.

I once got a call from a bank, asking me to compute a mortgage, since their computers were down. This was a very depressing moment.