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The Hasse diagrams of all the lattices with up to four elements are _____ (write all the relevant Hasse diagrams)
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Anything other than this?

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one more is straight line ryt ?
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Chain diagram;

Like 1-->2--->3--->4....in vertical manner.
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what is meant by ' up to 4 elements ' here..should we consider lattices with 3 elements and 2 elements also??

1. Diamond structure
2. Straight line structure
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For straight line structure one of the relationship could be $cardinality$.

$|\phi| \leq |a| \leq |b| \leq |a,b|$

We cant draw a lattice with 1 element

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Why can't we draw a lattice with one element ?
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i think definition itself says  every pair has lub and glb so atleast 2 element should be there for pair
One diamond diagram as u can see above and one like below

Chain diagram;

Like 1-->2--->3--->4....in vertical manner.

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