# Abhishek Solomon

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## Activity overview

Latest activity by Abhishek Solomon
• Abhishek Solomon commented,

Thank you Jaromil. I do have constraints in the BIP model, i have just shown the objective function above. The constraints used are: for i in facilities:    for j in customers:        m.addConstr(S...

• Abhishek Solomon created a post,

### Facility Location Problem - Standard BIP vs QUBO

Awaiting user input

Hello, I'm fairly new to the optimization world, and working on a research project that involves comparison of solving times for the standard uncapacitated facility location problem, using the foll...

• Abhishek Solomon created a post,

### "string index out of range" error within quicksum

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Hello, The below line of code gives me an "IndexError: string index out of range" error: for j in def_attributes:   m.addConstr(gp.quicksum(PlayerSelect[i]*current_fitness[i]*PlayerAttributes[i,j]...

• Abhishek Solomon commented,

Thank you Jaromil for your response, really appreciated! I'm working on a school project where a quadratic objective function is considered out of scope and hence needs to be linearized. Any help w...

• Abhishek Solomon created a post,

### Linearizing a quadratic objective function

Hello, I'm fairly new to optimization and Gurobi. I have the following objective function to be mazimized: Xi and Xz are both decision variables. How do i linearize this? Thanks, Abhishek

• Abhishek Solomon commented,

Thanks a lot Dan. I notice that your suggestion also has 3 if statements. Just out of curiosity, will this be more efficient than how I've done it? Or is it just a way to avoid creating new variables?

• Abhishek Solomon commented,

Hello Dan, Firstly, thank you for the elaborate reply. I think i posted the definitions of a and b incorrectly, here's the correct snippet: for j in produce:    for t in periods:        if t-harves...

• Abhishek Solomon created a post,

### Conditional constraints

Hello, I'm fairly new to code/Gurobi - I'm trying to write the following constraint, and it does not look optimal to me. Is there a way of writing the following without having to use a, b and c? fo...

• Abhishek Solomon commented,

Thank you Eli Towle ! Yes, yieldpersqft is fixed data. I will try this and come back if there's any other issue.

• Abhishek Solomon created a post,