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The paper presents data on the muon component with a threshold\(\varepsilon_{thr} \geq\) 1 GeV. Air showers were registered at the Yakutskarray during almost 50 years of continuous air shower observations. Thecharacteristics of muons are compared with calculations of QGSjetII-04 and EPOSLHC models for a proton and an iron nucleus. There is a muon deficit in themodels, at energies greater than 5 EeV. To make an agreement betweenexperimental data and simulations on muons, further tuning of the models isrequired.

Muons in showers with energy $E_{0} \geq$ 5 EeV and QGSjetII-04 and EPOS LHC models of hadronic interactions. Is there a muon deficit in the models?