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Relaxing integrality on specific index values of a variable
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6
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49
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February 13, 2025
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Setting up piecewise linear variables reading excel data
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2
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14
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February 10, 2025
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How to set "variable hints" for Gurobi
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1
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8
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January 30, 2025
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Warmstarting an LP with an added equality constraint
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6
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26
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January 12, 2025
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Using information from the presolve phase to improve the model
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1
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14
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January 12, 2025
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Ensuring Independent Paths in Multi-Line Network Optimization with "Unique Father Only" Constraints
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3
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11
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November 10, 2024
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Help Needed for Linearizing a Conditional Expression in Optimization Model
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1
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9
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November 10, 2024
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Is it necessary to apply normalization to unknown parameters with different scales?
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3
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25
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October 22, 2024
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AMPL PLF (piecewise linear function) as a CC (convex combination) modelling!
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3
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26
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October 18, 2024
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Error in defining a symbolic link
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1
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22
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July 30, 2024
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Object value is zero
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1
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27
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July 22, 2024
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Location of Service Facilities for the Elderly - A utilization-maximizing
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1
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23
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July 8, 2024
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Defining constraints on specific indices of a set
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3
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119
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April 25, 2024
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Sparse matrix in objective function
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1
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71
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April 20, 2024
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Obtain reduced model after AMPL presolve
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2
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95
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April 16, 2024
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Speeding up running time
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5
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174
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April 10, 2024
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Right hand side of constraints
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7
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391
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April 8, 2024
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Suggestions on model
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6
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189
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March 27, 2024
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Bilevel Optimization, DEA, argmax
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1
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129
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March 27, 2024
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Error in Couenne in amplpy
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1
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98
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March 27, 2024
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Syntax error in ampl
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2
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211
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March 25, 2024
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Python: use results of a solution
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15
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204
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March 24, 2024
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If then Else throwing syntax error
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2
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212
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March 19, 2024
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Syntax error AMPL var
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5
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538
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March 11, 2024
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Summation Syntax Question
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1
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206
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March 8, 2024
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Exercise 1-6 "impossible deduced bounds" presolve error
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4
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165
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February 26, 2024
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Adjust mu for bounds to promote Sparsity in Knitro Interior/Direct algorithm
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1
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111
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February 22, 2024
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Combine models: solve a model with the solution of another
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5
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134
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February 16, 2024
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Help : change permutations
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6
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172
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January 17, 2024
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Lazy constraint and user cut
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1
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172
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January 16, 2024
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