How get the extreme directions of an unbounded feasible region












0












$begingroup$


The following constraints form a feasible region.



$-x_1+x_2 le 2$



$-x_1+2x_2 le 6$



$x_1,x_2 ge 0$



The feasible region have three extreme points: $e_1=left[begin{array}{cc}
0\
0
end{array}right]$
$e_2=left[begin{array}{cc}
0\
2
end{array}right]$
$e_3=left[begin{array}{cc}
2\
4
end{array}right]$



What is the procedure that I need to follow to extract the extreme direction from this data?



Extrene Direction: An extreme direction of a convex set is a direction of the set that cannot be represented as a positive combination of two distinct directions of the set.










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$endgroup$












  • $begingroup$
    the costraints equations with the term on the right 0 and with "=" instead of $le$.
    $endgroup$
    – tommycautero
    Jan 23 at 14:07










  • $begingroup$
    What do you mean by "extreme directions" in this context?
    $endgroup$
    – callculus
    Jan 23 at 18:38










  • $begingroup$
    Check the edit that I've done
    $endgroup$
    – user637533
    Jan 23 at 19:03
















0












$begingroup$


The following constraints form a feasible region.



$-x_1+x_2 le 2$



$-x_1+2x_2 le 6$



$x_1,x_2 ge 0$



The feasible region have three extreme points: $e_1=left[begin{array}{cc}
0\
0
end{array}right]$
$e_2=left[begin{array}{cc}
0\
2
end{array}right]$
$e_3=left[begin{array}{cc}
2\
4
end{array}right]$



What is the procedure that I need to follow to extract the extreme direction from this data?



Extrene Direction: An extreme direction of a convex set is a direction of the set that cannot be represented as a positive combination of two distinct directions of the set.










share|cite|improve this question











$endgroup$












  • $begingroup$
    the costraints equations with the term on the right 0 and with "=" instead of $le$.
    $endgroup$
    – tommycautero
    Jan 23 at 14:07










  • $begingroup$
    What do you mean by "extreme directions" in this context?
    $endgroup$
    – callculus
    Jan 23 at 18:38










  • $begingroup$
    Check the edit that I've done
    $endgroup$
    – user637533
    Jan 23 at 19:03














0












0








0





$begingroup$


The following constraints form a feasible region.



$-x_1+x_2 le 2$



$-x_1+2x_2 le 6$



$x_1,x_2 ge 0$



The feasible region have three extreme points: $e_1=left[begin{array}{cc}
0\
0
end{array}right]$
$e_2=left[begin{array}{cc}
0\
2
end{array}right]$
$e_3=left[begin{array}{cc}
2\
4
end{array}right]$



What is the procedure that I need to follow to extract the extreme direction from this data?



Extrene Direction: An extreme direction of a convex set is a direction of the set that cannot be represented as a positive combination of two distinct directions of the set.










share|cite|improve this question











$endgroup$




The following constraints form a feasible region.



$-x_1+x_2 le 2$



$-x_1+2x_2 le 6$



$x_1,x_2 ge 0$



The feasible region have three extreme points: $e_1=left[begin{array}{cc}
0\
0
end{array}right]$
$e_2=left[begin{array}{cc}
0\
2
end{array}right]$
$e_3=left[begin{array}{cc}
2\
4
end{array}right]$



What is the procedure that I need to follow to extract the extreme direction from this data?



Extrene Direction: An extreme direction of a convex set is a direction of the set that cannot be represented as a positive combination of two distinct directions of the set.







linear-programming






share|cite|improve this question















share|cite|improve this question













share|cite|improve this question




share|cite|improve this question








edited Jan 23 at 19:02







user637533

















asked Jan 23 at 14:03









user637533user637533

83




83












  • $begingroup$
    the costraints equations with the term on the right 0 and with "=" instead of $le$.
    $endgroup$
    – tommycautero
    Jan 23 at 14:07










  • $begingroup$
    What do you mean by "extreme directions" in this context?
    $endgroup$
    – callculus
    Jan 23 at 18:38










  • $begingroup$
    Check the edit that I've done
    $endgroup$
    – user637533
    Jan 23 at 19:03


















  • $begingroup$
    the costraints equations with the term on the right 0 and with "=" instead of $le$.
    $endgroup$
    – tommycautero
    Jan 23 at 14:07










  • $begingroup$
    What do you mean by "extreme directions" in this context?
    $endgroup$
    – callculus
    Jan 23 at 18:38










  • $begingroup$
    Check the edit that I've done
    $endgroup$
    – user637533
    Jan 23 at 19:03
















$begingroup$
the costraints equations with the term on the right 0 and with "=" instead of $le$.
$endgroup$
– tommycautero
Jan 23 at 14:07




$begingroup$
the costraints equations with the term on the right 0 and with "=" instead of $le$.
$endgroup$
– tommycautero
Jan 23 at 14:07












$begingroup$
What do you mean by "extreme directions" in this context?
$endgroup$
– callculus
Jan 23 at 18:38




$begingroup$
What do you mean by "extreme directions" in this context?
$endgroup$
– callculus
Jan 23 at 18:38












$begingroup$
Check the edit that I've done
$endgroup$
– user637533
Jan 23 at 19:03




$begingroup$
Check the edit that I've done
$endgroup$
– user637533
Jan 23 at 19:03










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