Changes

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\texttt{(x, y)}

\texttt{(x, y)}

& = & \nu (x, y)

& = & \nu_2 (x, y)

& = & \tilde{x}y \lor x\tilde{y}

& = & \tilde{x}y \lor x\tilde{y}

& = & x^\prime y \lor x y^\prime

& = & x^\prime y \lor x y^\prime

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\texttt{(x, y, z)}

\texttt{(x, y, z)}

& = & \nu (x, y, z)

& = & \nu_3 (x, y, z)

& = & \tilde{x}yz \lor x\tilde{y}z \lor xy\tilde{z}

& = & \tilde{x}yz \lor x\tilde{y}z \lor xy\tilde{z}

& = & x^\prime y z \lor x y^\prime z \lor x y z^\prime

& = & x^\prime y z \lor x y^\prime z \lor x y z^\prime