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A labelled image of a lattice.

I am unable to understand how the GLB for i-f will be 'a' (or 0). Since both the points are connected to b and d (which are 2 greatest LBs), in which case it won't even be a lattice.

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  • $\begingroup$ You're right: it's not a lattice. Specifically, the meet, or greatest lower bound of $i$ and $f$ doesn't exist; likewise $c \vee f$ doesn't exist either. $\endgroup$ – amrsa Oct 9 at 21:00
  • $\begingroup$ thank you so much! $\endgroup$ – Akshat Oct 10 at 8:01

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