The position of the second order phase transition points for the stationary black holes has been argued by many authors recently.

首次提出了交流电机绕组△／带尾△接法的换相变极的对称条件，并利用双极对槽号相位图对之进行了严密的论证。

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These transformations are made up of renormalization group. Then the fixed point of transformation can be found, among which those unstable ones are critical points of phase transition.

然后找出重整化变换的不动点，在所有不动点中那些不稳定不动点是发生相变的临界点。

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