# Operation Research 8: Linear Programming | Simplex Method Solution Minimization | Duality | Summary and Q&A

1.5K views
December 15, 2021
by
Solomon Getachew
Operation Research 8: Linear Programming | Simplex Method Solution Minimization | Duality

## TL;DR

This content discusses the use of duality in linear programming to solve minimization problems using the simplex method.

## Key Insights

• 👻 Duality is an important concept in linear programming as it allows complex minimization problems to be solved by transforming them into easier maximization problems.
• 💁 The steps to solve a linear programming problem using duality include setting up a linear program in standard minimization form, formulating a dual problem in standard maximization form, using the simplex method to solve the dual maximization problem, and identifying the optimal solution to the original minimization problem from the optimal simplex tableau.
• ❓ Slack variables in the dual problem have the same values as the original decision variables in the primal problem.
• ❓ The coefficients for the decision variables in the primal problem become the slack variables in the dual problem.

## Transcript

hello everybody and welcome to lesson 8 linear programming solution simplex method using duality in the case of minimization last time we have we have discussed about duality so today we are going to use duality duality to solve the linear programming using simplex meter particularly in the case of maximization we have said that previously we have ... Read More

### Q: What is the purpose of using duality in linear programming?

Duality is important in linear programming because it allows us to solve complex minimization problems by transforming them into easier maximization problems.

### Q: How do you set up a linear program in standard minimization form?

To set up a linear program in standard minimization form, you need to identify the objective function and the constraints, ensuring that all variables are greater than or equal to zero.

### Q: How do you formulate a dual problem in standard maximization form?

To formulate a dual problem in standard maximization form, you need to transpose the matrix of coefficients from the original minimization problem and adjust the objective function and constraints accordingly.

### Q: How do you identify the optimal solution to the original minimization problem from the optimal simplex tableau?

The optimal solution to the original minimization problem can be identified by examining the values in the optimal simplex tableau, particularly the values in the basic variable column. The values in the basic variable column represent the optimal solution.

## Summary & Key Takeaways

• The content explains the use of duality in linear programming to solve minimization problems using the simplex method.

• It provides step-by-step instructions on how to set up a linear program in standard minimization form and formulate a dual problem in standard maximization form.

• The content also explains how to use the simplex method to solve the dual maximization problem and identify the optimal solution to the original minimization problem.