<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><br><blockquote type="cite"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hello Dippy Community,<div><br></div><div>I am a PhD candidate and am currently working with Dippy. I am very impressed by both its performances and by how user friendly it is. It is a pleasure!</div><div><br></div><div>However, some points remain mysterious:</div><div><br></div><div>1. Concerning the <b>branch_method </b>option<b>:</b></div><div><b><br></b></div><div><span class="Apple-tab-span" style="font-weight: bold; white-space: pre; "> </span>- Is it possible to create more than two branches at a given node? </div><div><b><br></b></div><div><span class="Apple-tab-span" style="font-weight: bold; white-space: pre; "> </span>- When the doPriceCut option is on, what is the default branching strategy that is used? </div><div><br></div><div><span class="Apple-tab-span" style="white-space: pre; "> </span>- If the doPriceCut option is on, is it possible to branch on the variables of the master problem? As these variables are automatically generated by Dippy and not defined by the user, how can one call them?</div><div><br></div><div><span class="Apple-tab-span" style="white-space: pre; "> </span>- If the doPriceCut option is on, is it possible to branch by adding constraints to the subproblem instead of returning sets of variables?</div><div><br></div><div><span class="Apple-tab-span" style="white-space:pre"> </span>- If the doPriceCut option is on, is it possible to add customized cuts for the master problem?</div><div><br></div><div><span class="Apple-tab-span" style="white-space:pre"> </span>- If the doPriceCut is on, are customized cuts added by the <b>generate_cuts</b> method taken into account in the subproblem?</div><div><br></div><div>2. Concerning the <b>relaxed_solver </b>option<b>: </b></div><div><b><br></b></div><div><span class="Apple-tab-span" style="white-space: pre; "> </span>- In the documentation available online, examples show that the variable convexDual is an input parameter of the method. However, in the examples of the Dippy distribution, there is no such <span class="Apple-tab-span" style="white-space: pre; "> </span>parameter. I have found links on the web showing that the method was updated, and that it is no longer a parameter. So how do we access this variable? Is it hidden somewhere in redCosts?</div><div><br></div><div><span class="Apple-tab-span" style="white-space: pre; "> </span>- In the documentation available online, the example proposed is a dynamic programming algorithm for the subproblem, which is optimal. Does the method implemented in relaxed_solver have to be <span class="Apple-tab-span" style="white-space: pre; "> </span>optimal or can it be a heuristic (meaning does DipPy check whether it is optimal or not)? </div><div><br></div><div>Thank you very much for your help.</div><div><br></div><div>Romain</div></div></blockquote></div><br></body></html>