<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div dir="auto" class="" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;">Dear all</div><div dir="auto" class="" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;">Hello, I’m a user of EinsteinToolkit.<br class=""><div class="">Now, I’m trying to solve Poisson's equation using ctthorn as initial data before time evolution on EinsteinToolkit.</div><div class="">The boundary condition is 1/r.</div><div class=""><br class=""></div><div class="">I already implemented my thorns for the source term of the equation,</div><div class="">and solved the equation using "CT_MutiLevel”.</div><div class="">I checked if the final solution is good solution of the original equation, but</div><div class="">it is not good solution.</div><div class="">I changed the resolution, but it is not improved.</div><div class=""><br class=""></div><div class="">So, I may misunderstand how to use <span class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);">CT_MutiLevel thorns, and</span><span class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"> I have questions relate to "</span><span class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);">CT_MutiLevel"</span><span class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"> :</span></div><div class=""><span class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);">1)</span></div><div class=""><font color="#000000" class="">In order to understand correct behavior, </font></div><div class=""><font color="#000000" class="">I want to try test simulation using poisson.par, which is one of the example parameter file.</font></div><div class=""></div></div></body></html>