康明昌2006-07-262018-06-282006-07-262018-06-282000-07-31http://ntur.lib.ntu.edu.tw//handle/246246/20910國科會自八十七年度起補助專題計畫 成果報告準備方式有所變革，本文提供一 個統一格式，可供主持人撰寫報告時參考 使用。This is the first-year progress report of my research project "Rationality problem and Galois theorey (1/3)". What we have finished are (1) to study the invariants of Weyl algebras ; see: Generation of invariants, J. Algebra 221 (1999) 232~241。 (2) to study the rationality problem of a projective linear automorphism ; see: Rationality of some projective linear actions, J. Algebra 228 (2000) 643~658。 (3) to study the history and the recent progress of Tsen's Theoremapplication/pdf15595 bytesapplication/pdfzh-TW國立臺灣大學數學系暨研究所reporthttp://ntur.lib.ntu.edu.tw/bitstream/246246/20910/1/892115M002002.pdf