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Elements inverted by an automorphism and the sum of character degrees
Show that an automorphism of a finite group inverts at most as many elements as the sum of the irreducible character degrees.
Issue
疑问、子问题和求助。把大问题拆成子 Issue；从任何一个 Issue 都能开出路线。
没有开放的 Issue
Issue 用来放疑问、子问题和求助。