@defun integer->peano-coordinates scalar rank

Returns a list of @var{rank} nonnegative integer coordinates corresponding
to exact nonnegative integer @var{scalar}.  The lists returned by @code{integer->peano-coordinates} for @var{scalar}
arguments 0 and 1 will differ in the first element.
@end defun


@defun peano-coordinates->integer coords

Returns an exact nonnegative integer corresponding to @var{coords}, a list of
nonnegative integer coordinates.
@end defun