我們討論一些有限覆蓋在交換簇上的問題.這個問題和討論在海森堡群下的不變量昰同義的.我們在這討論兩個變數和三個變數的問題.

We produce some finite covering over abelian variables by explicit
construction. This is done by computing invariants of finite
heisenberg group. We have done this for coving of degree 3 and 4,
which corresponding to Heisenberg group action on 2 and 3
variables.

Introduction
Chapter 1 Invariant Theory
Chapter 2 Theta Function
Chapter 3 Linear Representation of Finite Group
Chapter 4 Invariant of Finite Subgroup of Heisenberg Group

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