Notes for "Deep null space learning for inverse problems: convergence analysis and rates"
J.Schwab,S.Antholzer,M.Haltmeier,Deepnullspacelearningforinverseproblems:convergenceanalysisandrates,InverseProblems,35,2019,025008.Page8,proofofTheorem2.8WehaveandNotes:Inthefollowing,weassumeisacomp