据说，世界上真正明白相对论的只有两个人……爱因斯坦和我。:D:$
开玩笑，其实谁又能真正明白呢？就是物理学教授也不见得真正明白吧。
This problem is similar with....
C+C = C
this problem looks similar with a problem in set theory.
let see two set of number
1,2,3,4,5....
2,4,6,8,10.....
There is always a number in the lower row corresponding for a number in the upper row. However, the lower row only contains half of the elements of the upper row. In fact, the two sets have the same size.
If we look the size of a infinite set as C, then we have C+C = C.
this problem looks similar with a problem in set theory.
let see two set of number
1,2,3,4,5....
2,4,6,8,10.....
There is always a number in the lower row corresponding for a number in the upper row. However, the lower row only contains half of the elements of the upper row. In fact, the two sets have the same size.
If we look the size of a infinite set as C, then we have C+C = C.
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