Topic: "Reduction of errors, or the pursuit of correctness"Speaker: Ge Baolai, SHARCNETVideo link  --- In this talk, we address the impact of rounding errors encountered but often ignored in scientific and high performance computing. We begin with examples in day to day research computing and then advance to an example of summation in parallel computing with MPI and OpenMP reduction. We wish to share our explorations and hope this talk may lead to future discussions.---The Compute Ontario Colloquia are weekly Zoom presentations on Advanced Research Computing, High Performance Computing, Research Data Management, and Research Software topics, delivered by staff from three Compute Ontario consortia (CAC, SciNet, SHARCNET) and guest speakers. The series began January 2023 and superseded similar series previously delivered by individual consortia (e.g. General Interest Seminars by SHARCNET or User Group Meeting TechTalks by SciNet). The colloquia are one hour long and include time for questions. No registration is required. Presentations are usually recorded and uploaded to the hosting consortium video channel (colloquia hosted by SHARCNET go to our youtube channel).