Two comments: 1. GLPK is a linear solver. If x and y are variables, then (x^i)(y^j) is a non-linear term in the unknowns x and y. 2. It is not clear from your description what is i and j.
-Marc From: Help-glpk <help-glpk-boun...@gnu.org> On Behalf Of Andrew Makhorin Sent: Tuesday, November 1, 2022 6:04 AM To: help-glpk@gnu.org Subject: [Fwd: Using the summation operator with GLPK.] CAUTION: This email originated outside the company. Do not click links or open attachments unless you are expecting them from the sender. -------- Forwarded Message -------- Date: Mon, 31 Oct 2022 20:46:36 +0000 Subject: Using the summation operator with GLPK. To: help-glpk@gnu.org<mailto:help-glpk@gnu.org> <help-glpk@gnu.org<mailto:%22help-g...@gnu.org%22%20%3chelp-g...@gnu.org%3e>> From: philliprusso <phillipru...@proton.me<mailto:philliprusso%20%3cphillipru...@proton.me%3e>> So from reading the documentation I guess that GLPK can read a file in and that there are a number of formats to be using. So I would like to start using GLPK in the C++ language for Ubuntu 18.0.45 LTS that I am using for the windows subsystem for linux and visual studio code. The problem I am trying to solve is using the summation operator. In latex format it goes like this: (For a point list P(x,y)_{n} \sum {k=0}^{n} \alpha_{k}*x^{i}*y^{j} The summation with the value k and permuting n times over the formula alpha of k multiplied by x to the i power multiplied by y to the j power. This is the formula for a 2D problem for a finite element analysis coming from the book Analysis of Structures and Material Behaviors for Kindle. The number of terms is said to formulate to (n+1)(n+2)/2. Does GLPK handle the summation operator somehow. Can I see some example of how to implement such a problem with a GLPK file format (any format that works is great) and or how to calculate this thing. The trouble I have is that with the inclusion of i and j with the summation operator I couldn't find a calculator available on the internet that can handle such a thing and also so far I have been unable to get help from anyone that knows how to. Thank You! Any type of help would be greatly appreciated. Sent with Proton Mail<https://urldefense.com/v3/__https:/proton.me/__;!!O7V3aRRsHkZJLA!ATYmVSiw0wwN_09LhaMqBAQP2iv46sZ0NmdG6wlueX5rCrJctfsIje5XeDlYVkiJaAqlSqQd4t2OGHKE$> secure email. ________________________________ This e-mail and any attachments may be confidential or legally privileged. If you received this message in error or are not the intended recipient, you should destroy the e-mail message and any attachments or copies, and you are prohibited from retaining, distributing, disclosing or using any information contained herein. Please inform us of the erroneous delivery by return e-mail. Thank you for your cooperation. For more information on how we use your personal data please see our Privacy Notice<https://www.oliverwyman.com/policies/privacy-notice.html>.