文中涉及的主要理论有群论，伽罗华域，模代数和线性代数。
The main means used in the paper are group theory, Galois field, module algebra and linear algebra.
在伽罗华有限域理论的基础上，用素域上的二次素数序列对素数码的码函数进行改进。
Based on Galois theory of definite field, using the square prime sequence, the code function of basic prime code is modified and extended.
《宋史·三佛齐传》记载，熙宁十年(1077年)其国大首领地华伽罗入贡，但在《注辇传》中却记地华伽罗为注辇国王。
According to the accounts of History of the Song Dynasty, the big chieftain Deva Kulo paid tribute in 1077, but he was accounted as the king of Chola in Biography of Chola.
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