Definition:Wythoff Pair

Definition
A Wythoff pair is an ordered pair of integers of the form:
 * $\tuple {\floor {k \phi}, \floor {k \phi^2} }$

where:
 * $\phi$ denotes the golden section: $\phi = 1 \cdotp 618 \ldots$
 * $\floor x$ denotes the floor of $x$
 * $k$ signifies a positive integer: $k \in \Z_{\ge 0}$.

Thus the coordinates of a Wythoff pair are corresponding terms of the lower and upper Wythoff sequences.