You are Here: Home >< Maths

# D2 simplex method Watch

1. How do you select the pivot element in the simplex method if your theta values are 0,3, and -3 (just making them up).

I know you choose the smallest positive number, but can you choose 0 as the pivot.

Thanks
2. do you mean the value = 0 or the value for x or y or z = 0?

if its the latter you will have something/0 which can't be done, if its the former, you are implying that a function of x, y and z is to be less than 0? i don't think this will occur
3. (Original post by Bobjim12)
do you mean the value = 0 or the value for x or y or z = 0?

if its the latter you will have something/0 which can't be done, if its the former, you are implying that a function of x, y and z is to be less than 0? i don't think this will occur
When you're finding the pivot, so you choose the column with the most negative value that's in the objective row, and the you divide each "value" by its corresponding value, and depending on these outcome you choose different pivots.

Here's what I'm trying to say:

My question is, what if one of these theta values was 0, can you choose this row as your pivot row?
4. (Original post by fullmetal heart)
When you're finding the pivot, so you choose the column with the most negative value that's in the objective row, and the you divide each "value" by its corresponding value, and depending on these outcome you choose different pivots.

Here's what I'm trying to say:

My question is, what if one of these theta values was 0, can you choose this row as your pivot row?
oh okay, well 0 isn't positive, so you wouldn't.

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: June 25, 2016
Today on TSR

### Medicine offers rolling in

Which unis have sent theirs?

### I refused to be served by tattooed cashier

Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• Poll
Useful resources

Can you help? Study help unanswered threadsStudy Help rules and posting guidelinesLaTex guide for writing equations on TSR

## Groups associated with this forum:

View associated groups
Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.