Re: [math-fun] elliptic mean

I blithered

(c562) circumference_ellipse(a,b)/2/%pi

2 b 2 a elliptic_ec(1 - --) 2 a (d562) ----------------------- %pi

is clearly a legitimate mean(a,b), ...

Guilt by nonassociation: (c138) em(a,b):=circumference_ellipse(a,b)/2/%pi$ (c139) dfloat(em(em(2,4),em(3,1))) (d139) 2.62751721836387d0 (c140) dfloat(em(em(2,1),em(3,4))); (d140) 2.62733046926582d0 Also, Department of Redundancy Department:

... discriminant of the nth Legendre polynomial discriminant. Sorry for the pollution. But thanks (Gary and Dick) for the solution. --rwg BLITHER HILBERT SPACE - PEACH BLISTER