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$x\le y \iff x\rightarrowt y=1$ is a partial order, with $1$ as greatest element, and $\wedge$ is a meet in this partial order. \cite{Idziak1984} |
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$x\le y \iff x\rightarrow y=1$ is a partial order, with $1$ as greatest element, and $\wedge$ is a meet in this partial order. \cite{Idziak1984} |