Linear Programming, Lecture 9. Artificial Variables;

Sept 20, 2016. Penn State University.

[RafaelSouza-wctd]

It is very easy to learn with Professor Wen Shen! Thank you very much for the classes. It's been a great help here!

[arthur]

For anyone looking for the LP Assistant, the old link is dead. After searching a lot, I found it in the page of the professor who created it:

[jameszack]

54:57 you should have chosen the most negative column in cost function W, in this case x3. Because x3 is -5 there. Whereas x2 is -2. So, x3 is more negative than x2. Thus, you should have chosen x3 as basic variable for the next iteration.

[kastuar]

Brilliantly Explained two phase multiple artificial one more thing can be added, what if some NBV's are free can vary from -INF to +INF

[magdiyouseff]

prof. if i am working on a machine that for safe operation its variable x is limited 10<=x<=50.
can i expand this constraint into two constraints with to additional slack variables as follow?
x<=50 and x>=10 then x+x1=50 and x-x2=10

[ahmadrezaazimi]

Is there any video of yours regarding big M and two phase method ?

[mehreetsingh]

There is a error its not feasible as at end wmin comes out to be greater than 0 its a software error

[albertocentelles]

I couldn't hear the question on min 55. Could you explain why you modified your answer? Thank you!