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In linear programming, what does the primal problem imply about the sign of the dual variables?
Duality. Is this the correct Dual to this Primal L.P.?Defining Dual problems in Linear programming optimizationweak duality theoremDual problem of a maximization primal problem $P$?Linear Programming Duality ProofWhy do these starting conditions for primal dual path following algorithm imply that mu must be small?Game Theory - Solve dual problem given primal solution and slack variablesWhat is the significance of an infeasible solution to a network flow problem?Primal-dual correspondence in the simplex methodDegeneracy and Uniqueness in General LPin linear programming, why does the dual have constraints?
$begingroup$
In Bertsimas' Introduction to Linear Optimization, we define the primal problem in standard form as minimizing $c'x$ subject to $Ax=b$ and $xgeq0$, and the dual problem as maximizing $p'b$ subject to $A^* p geq c$.
He makes the comment that this definition of the dual problem requires $p_i$ to have the same sign as that of $a'_i x - b_i$. I've gone back through the derivation of the dual problem and its constraints a few time, and am having trouble understanding why this is.
Any thoughts?
Thanks!
linear-programming
$endgroup$
add a comment |
$begingroup$
In Bertsimas' Introduction to Linear Optimization, we define the primal problem in standard form as minimizing $c'x$ subject to $Ax=b$ and $xgeq0$, and the dual problem as maximizing $p'b$ subject to $A^* p geq c$.
He makes the comment that this definition of the dual problem requires $p_i$ to have the same sign as that of $a'_i x - b_i$. I've gone back through the derivation of the dual problem and its constraints a few time, and am having trouble understanding why this is.
Any thoughts?
Thanks!
linear-programming
$endgroup$
$begingroup$
A good explanation about transforming a primal problem into a dual problem can be found here by Mike Spivey
$endgroup$
– callculus
Mar 11 at 20:23
add a comment |
$begingroup$
In Bertsimas' Introduction to Linear Optimization, we define the primal problem in standard form as minimizing $c'x$ subject to $Ax=b$ and $xgeq0$, and the dual problem as maximizing $p'b$ subject to $A^* p geq c$.
He makes the comment that this definition of the dual problem requires $p_i$ to have the same sign as that of $a'_i x - b_i$. I've gone back through the derivation of the dual problem and its constraints a few time, and am having trouble understanding why this is.
Any thoughts?
Thanks!
linear-programming
$endgroup$
In Bertsimas' Introduction to Linear Optimization, we define the primal problem in standard form as minimizing $c'x$ subject to $Ax=b$ and $xgeq0$, and the dual problem as maximizing $p'b$ subject to $A^* p geq c$.
He makes the comment that this definition of the dual problem requires $p_i$ to have the same sign as that of $a'_i x - b_i$. I've gone back through the derivation of the dual problem and its constraints a few time, and am having trouble understanding why this is.
Any thoughts?
Thanks!
linear-programming
linear-programming
edited Mar 11 at 19:56
Brian
601114
601114
asked Mar 11 at 19:50
user49404user49404
579
579
$begingroup$
A good explanation about transforming a primal problem into a dual problem can be found here by Mike Spivey
$endgroup$
– callculus
Mar 11 at 20:23
add a comment |
$begingroup$
A good explanation about transforming a primal problem into a dual problem can be found here by Mike Spivey
$endgroup$
– callculus
Mar 11 at 20:23
$begingroup$
A good explanation about transforming a primal problem into a dual problem can be found here by Mike Spivey
$endgroup$
– callculus
Mar 11 at 20:23
$begingroup$
A good explanation about transforming a primal problem into a dual problem can be found here by Mike Spivey
$endgroup$
– callculus
Mar 11 at 20:23
add a comment |
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A good explanation about transforming a primal problem into a dual problem can be found here by Mike Spivey
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– callculus
Mar 11 at 20:23