Sorry, typo: I wrote: > as in X>Z,Y>Z,X?Z but meant X>Z,Y>Z,X?Y of course. As a Hasse diagram:
X Y
\ /
\ /
Z
Not to be confused with X=Y>Z:
X=Y
|
|
Z
More complex example: A>B>C>D,A>E=F>D:
A
/ \
B \
| E=F
C /
\ /
D
Jobst
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