论文中，他们证明了这些计算是数学等价的。
In their paper, they prove that these computations are mathematically equivalent.
心理异的数学上是等价的信息
Psychological nonequivalence of mathematically equivalent information
换句话说，在数学上描述方位就等价于描述角位移。
In other words, describing an orientation is mathematically equivalent to describing an angular displacement.
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