tag:blogger.com,1999:blog-593563533834706486.post7740333215402064127..comments2024-03-28T10:35:10.453-04:00Comments on Yet Another Math Programming Consultant: Multiplication of a continuous and a binary variableErwin Kalvelagenhttp://www.blogger.com/profile/09496091402502236997noreply@blogger.comBlogger8125tag:blogger.com,1999:blog-593563533834706486.post-45634923944903753332022-03-03T03:19:59.698-05:002022-03-03T03:19:59.698-05:00Thank you, that was helpful. It would be better if...Thank you, that was helpful. It would be better if the last two constraints to be used were clearly highlighted. Anonymoushttps://www.blogger.com/profile/06733032196644071217noreply@blogger.comtag:blogger.com,1999:blog-593563533834706486.post-13156609534032062912021-08-07T13:19:35.315-04:002021-08-07T13:19:35.315-04:00This has been really helpful for me in model const...This has been really helpful for me in model construction. Thanks a lot!!!Edgar Duartehttps://edgarduarteforero.github.io/noreply@blogger.comtag:blogger.com,1999:blog-593563533834706486.post-89128090646417556872019-07-19T05:19:56.386-04:002019-07-19T05:19:56.386-04:00Thank you
So I will mail the model and details to ...Thank you<br />So I will mail the model and details to you if you permit?John Heraldsnoreply@blogger.comtag:blogger.com,1999:blog-593563533834706486.post-49658075882100751972019-07-18T08:58:34.491-04:002019-07-18T08:58:34.491-04:00This cannot be answered without much more knowledg...This cannot be answered without much more knowledge about the model, the formulation and the solver.Erwin Kalvelagenhttps://www.blogger.com/profile/09496091402502236997noreply@blogger.comtag:blogger.com,1999:blog-593563533834706486.post-70386600174828672102019-07-18T03:17:49.111-04:002019-07-18T03:17:49.111-04:00Hello,
I have used this formulation in two terms o...Hello,<br />I have used this formulation in two terms of my model that one of them are directly get involved in the objective function. However, I discovered that the corresponding term in the objective function makes the model computationally complicated.<br />I.e., let R be the linear product of two variables ( acontinuous and a binary one). When I run the model without R in the objective function, the model is being solved in less than 1 minute, but, it will take more than 2 hours with R in the objective function.<br /><br />Do you know that it is the nature of this formulation, or I did something wrong?John Heraldsnoreply@blogger.comtag:blogger.com,1999:blog-593563533834706486.post-3557384008623770852014-01-19T14:04:47.012-05:002014-01-19T14:04:47.012-05:00Continuous * Continuous variable means either use ...Continuous * Continuous variable means either use a QP or NLP algorithm or formulate a piecewise linear function.Erwin Kalvelagenhttps://www.blogger.com/profile/09496091402502236997noreply@blogger.comtag:blogger.com,1999:blog-593563533834706486.post-10800353260485720382014-01-19T08:53:03.564-05:002014-01-19T08:53:03.564-05:00Hey i have a problem where i have a function calle...Hey i have a problem where i have a function called average_price = a+b*x where x is a variable for the amount of products, a and b is constants from a table. The problem is when we have to find the total price/cost, (a+b*x)*x this makes the non-linear error.. do you have any suggestions ??Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-593563533834706486.post-43742592449250959672012-08-14T11:11:06.205-04:002012-08-14T11:11:06.205-04:00that's so cool man! thx!that's so cool man! thx!Aprillatehttps://www.blogger.com/profile/10033027269342182357noreply@blogger.com