My thanks to those who have recently given us the abiility to render mathematics in Warwick blogs.
I can't resist the temptation to try it out. Tradition has it that the phrase "Let no-one ignorant of geometry enter" was inscribed on the door to Plato's academy. For a more modern mathematical motto one might choose Euler's identity:
linking in a surprising manner five fundamental, apparently-unrelated mathematical constants: 0, 1, i, e, and . Hence the in-joke "We are number " sometimes seen on mathematics students' T-shirts.