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Summation over two sets

  • September 4, 2023
  • 2 replies
  • 58 views
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  • Eddy
  • Enthusiast
  • 3 replies

Hi All,

can someone explain how to enter this as a constraint in AIMMS:

(“für alle” means for all)

This is what I did:

I always get an error notification :(

Thanks in advance!

 

Best,

Eddy

Best answer by MarcelRoelofs

@Eddy You're missing a comma after the tuple in the sum, so

sum((i_souce,i_transportationmode), ...) = …

 

 

 

 

2 replies

MarcelRoelofs
AIMMSian
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  • MarcelRoelofs
  • AIMMSian
  • 107 replies
  • Answer
  • September 4, 2023

@Eddy You're missing a comma after the tuple in the sum, so

sum((i_souce,i_transportationmode), ...) = …

 

 

 

 

Marcel Roelofs - AIMMS Product Portfolio Architect
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  • Eddy
  • Author
  • Enthusiast
  • 3 replies
  • September 4, 2023

Hi Marcel,

thanks a lot! Would have never noticed … 


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