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経済理論と数学—連立一次方程式— Economic theory and mathematics — Simultaneous linear equations — 今川, 正 イマガワ, タダシ Imagawa, Tadashi 331 departmental bulletin paper 香川大学経済研究所 Institute of Economic Research, Kagawa University 1957-03-01 VoR application/pdf 香川大学経済論叢 6 29 69 87 Kagawa University economic review AN00038281 0389-3030 https://kagawa-u.repo.nii.ac.jp/record/5126/files/AN00038281_29_6_69.pdf https://kagawa-u.repo.nii.ac.jp/records/5126 jpn open access