If $E4$ is the set of all equivalence relations on $\{1,2,3,4\}$,and we define a poset as
$(E4, \{(R1,R2) \in E4 \times E4 \mid R1 \subseteq R2\})$
then what would be the length of largest chain of this poset?
If $E4$ is the set of all equivalence relations on $\{1,2,3,4\}$,and we define a poset as
$(E4, \{(R1,R2) \in E4 \times E4 \mid R1 \subseteq R2\})$
then what would be the length of largest chain of this poset?
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