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@code{(require 'peano-fill)}
@ftindex peano-fill


@defun natural->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{natural->peano-coordinates} for @var{scalar}
arguments 0 and 1 will differ in the first element.
@end defun


@defun peano-coordinates->natural coords

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


@defun integer->peano-coordinates scalar rank

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