Instead Priory placed all his bets on a deceptively simple concept--convergence between the markets for gas and electricity.

FORBES: Trading places

Membership of the single currency would take a bit longer, but pro-EU politicians say the simple act of applying and working towards euro convergence would reassure the markets.

ECONOMIST: Charlemagne

In this simple mnemonic example, the clench phase corresponds to convergence and the release to divergence.

FORBES: The Pittsburgh Six: The Template for Innovation