On 02/12/2011 01:55 AM, bearophile wrote: > 4) My fourth choice is "iota". It's short and it sticks in mind. 'Ψ' "psi" (beeing the forelast letter of the alphabet, just before omega, as everyone knows) would nicely suggest we're dealing with intervals half-open on the right-hand side. Denis -- _________________ vita es estrany spir.wikidot.com