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We consider the following subsets of
[x, y] where x < y holds.

F_{1} = {x  1, y  2}

F_{2} = {x(x  1),(x  1)y + 1}

F_{3} = {x(x  1),(x  1)y}

F_{4} = {x, xy + 1}

F_{5} = {x(y  1) + (x  1)(y  2)y, xy + (x  1)(y  3)y}.
For each of them give a triangular decomposition of
(F).
In each case this will be a sequence of 0, 1 or 2 triangular sets such that
the union of their regular zeros is
(F).
Next: Exercise 3.
Up: Quiz4
Previous: Exercise 1.
Marc Moreno Maza
20050204