Daily Archives: April 4, 2011

斜率

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這裡很麻煩：由 -2 變成 -3，應該叫做「變大」還是「變小」？

無論怎樣答，都好像不妥當。為了清晰起見，這裡應該避用「大/小」這個字眼。我們可以這樣說， -3 比 -2 更加「負」； +3 比 +2 更加「正」。

如果斜率是正數的話，越正越斜：越正的斜率數值，代表越斜的斜線；如果斜率是負數的話，越負越斜。

— Me@2011.04.04

2011.04.04 Monday (c) All rights reserved by ACHK

White hole 3

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Again, the time reversal of macroscopic processes can only exist if we “saturate” the second law of thermodynamics: if the entropy stays constant. The time reversal of such processes keeps the entropy constant, too. These processes are not real processes because nothing much is changing. Instead, they describe a physical system at equilibrium.

— Lubos Motl

2011.04.04 Monday ACHK