revision sent to 3 referees on apr 16/06
-------------------------------------------
2 reports sent to author on aug 4/05:
final report sent on aug 8 and revision requested

referee 1 Borchers - rejected  --- apr 17: borchers agrees to ref revision 

referee 2 Kojima - revision recommended--- apr 17: kojimaagrees to ref revision 
Kojima asked again on july 18/06
he replied on 20th --- ok to accept

referee 3 Helmberg - revision recommended  ---- Helmberg replies 'ok'
    on July 18/06 except for 3 typos:

- page 2, line -16: ... The su{b}problem ...
- page 2, line -15:  ... The solution of {a} quadratic program ...
- page 8, line 16: ... effective {if} the sturcutre in Z ...