Re: [math-fun] We can't have mental gymnastics without a floor exercise.

On 1/14/14, Bill Gosper <billgosper@gmail.com> wrote:

On 2013-12-06, at 9:36 AM, Adam P. Goucher wrote:

Half-integers are rounded to the nearest even integer.

Exercise: Write Round using only Floor, +, -, *, /,

and of course, \[NotHumpDownHump].

--rwg

(And please stay off the nonEuclidean parallel bars.)

And what the San-Fairy-Ann does a \[NotHumpDownHump] look like --- assuming it can be persuaded to remain stationary for a period extended sufficiently to permit visual identification? SPOILER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . x -> 2[(2 x + 1)/4] WFL