Go To Slide: Gemini and HEPFitting Minimization and fitting Gemini: a GEneral MINImizer Gemini: functions and objects Gemini: objective function Gemini: constraint function Gemini: solution Gemini: default output Gemini: error analysis HEPFitting: features HEPFitting: steps to go (I) HEPFitting: steps to go (II) HEPFitting: built-in models Single-component models Multi-component models Example: derived model class Example: continued Errors and confidence regions