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From: carey on 11 Apr 2010 03:57
Bernard Parisse's Erable 3.2 manual mentions (p.49) that:

"There is currently only one program available in the other directory,
written in UserRPL by John Wilson, that I have translated into SysRPL,
it is named TNBA for tangent, normal, binormal, acceleration. It takes
a 3-dimensional vector (as a list) at level 1 (e.g. { '2*T' 1 'T^2' })
and returns the position,
tangent, normal and binormal vectors as well as the tangential and
normal acceleration."

I searched this group, hpcalc.org and google but found no listing of
John Wilson's original Differential Geometry UserRPL program. Does
anyone know where it might be available?

Thanks,
Carey


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