كلية العلوم الرياضية والاحصاء
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Item Theory of Lie algebra with applications to symmetry and conservation laws(Neelain University, 2016) Ismail Mustafa Mohammed OthmanAbstract _ In this research we studied Lie groups and Lie algebras . We considered the classification theory of complex and semi-simple Lie algebras , provided with sufficient knowledge of the properties of Lie algebras . We then concentrated on the application of Lie algebra to the conservation laws , in particular Noether theorem . We also studied the application of Lie algebra to particle physics including the utility of the representation theory of the five dimensional special unitary group. We concluded our research program with the study of symmetry groups of differential equations.Item Theory of Lie algebra with applications to symmetry and conservation laws(Al-Neelain University, 2016) Ismail Mustafa Mohammed OthmanAbstract In this research we studied Lie groups and Lie algebras . We considered the classification theory of complex and semi-simple Lie algebras , provided with sufficient knowledge of the properties of Lie algebras . We then concentrated on the application of Lie algebra to the conservation laws , in particular Noether theorem . We also studied the application of Lie algebra to particle physics including the utility of the representation theory of the five dimensional special unitary group. We concluded our research program with the study of symmetry groups of differential equations . IV المستخلص في هذا البحث درسنا زمر لي و جبر لي. درسنا نظرية تصنيف جبر لي المركبة وشبه البسيطة، مع توفير قدر كاف من المعرفة عن خصائص جبر لي. ثم ركزنا على تطبيق جبر لي لقوانين الحفظ ، وال سيما نظرية نوثر . درسنا أيضا تطبيق جبر لي لفيزياء الجسيمات يضم استخدام نظرية تمثيل الزمر ذات البعد الخامس في دراسة زمرة الوحدة الخاصة. ختمنا بحثنا بدراسة زمر التماثل للمعادالت التفاضلية.