1.  ramification exponent
2.  ramification index

• 1. 分歧指数: ramification index | ramification exponent | index of ramification
• 2. 相对分歧指数: relative ramification index
• 3. 态射分歧指数: ramification index of a morphism

• 1.运用上下解方法，不动点指数理论，局部分歧理论，得出了该系统存在多个正解或惟一正解的条件，即参数对解的个数有一定影响。
  By means of lower-upper solutions methods, theory of fixed point indices and local bifurcation theory, the conditions for multiplicity and uniqueness positive solutions of this system was obtained.
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