@techreport{oai:grips.repo.nii.ac.jp:00000925, author = {Polityko, S. and Takahashi, N. and Kato, M. and Yamada, Y. and Misaki, A.}, note = {In this paper we described the bremsstrahlung and direct pair production of muon in medium with the account of multiple scattering and medium polarization. These processes are essential for calculation electromagnetic cascade showers, accompaning extremely high energy muon.}, title = {THE BREMSSTRAHLUNG AND DIRECT PAIR PRODUCTION OF MUON AT EXTREMELY HIGH ENERGIES} }