Τι (ποιος) είναι sqsubseteq - ορισμός
sqsubseteq
LaTeX name for a symbol like a capital E without the bottom
half of its vertical line.
In domain theory,
x sqsubseteq y
means x is no more defined that y. This expression only has
meaning if x and y are comparable elements of some
partially ordered set.
(1994-11-24)
