Topic	Replies	Views	Activity
Implementing nested sets Support sets-and-indexing	1	77	May 5, 2025
Request for Support in Fixing the Errors Support solvers , sets-and-indexing , errors-and-messages , modeling-tips	1	72	February 19, 2025
Grouping houly data into days to find max parameter values New to AMPL general , sets-and-indexing	1	76	January 27, 2025
Unexpected behavior from defined set Support sets-and-indexing	2	79	December 11, 2024
AMPL duplicate member "x" for set "y", how to fix it Support displays-results , sets-and-indexing , errors-and-messages , files-preprocessing , modeling	3	943	April 6, 2023
Why do I get an “invalid subscript discarded” message when I display an AMPL parameter? FAQs sets-and-indexing	0	1161	December 15, 2021
Why doesn’t AMPL interpret the expression T..1 as I expect? FAQs sets-and-indexing	0	421	December 15, 2021
Why does “set S := 50 .. 70” give me a set of only 3 members? FAQs sets-and-indexing	0	501	December 15, 2021
I have declared “set S” and “param b {S}”. How do I write an AMPL expression for the arg min of b[i] — that is, the s in S such that b[s] equals the minimum of b[i] over al FAQs sets-and-indexing	0	600	December 15, 2021
How can I get AMPL to index over the “power set” consisting of all subsets of a set? FAQs sets-and-indexing	0	764	December 15, 2021
How can I apply AMPL’s ordered-set functions to pairs and higher-dimensional objects? FAQs sets-and-indexing	0	496	December 15, 2021

sets-and-indexing