∃x∀yP(x, y) → ∀y∃xP(x, y)

2014-11-17 9:40 pm
∃x∀yP(x, y) → ∀y∃xP(x, y)
how to prove?
更新1:

∃x∀yP(x, y) → ∀y∃xP(x, y) is a tautology. how to prove?

回答 (2)

2014-11-19 8:13 am
✔ 最佳答案
http://ecc.ee.nthu.edu.tw/2011_ee2060/DM2011SpringMID_I_solution%20_04052011.pdf

答案在此。

2014-11-18 20:05:46 補充:
哈哈哈~
太客氣了~

╭∧---∧╮
│ .✪‿✪ │
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2014-11-19 00:13:00 補充:

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Please read:


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2014-11-18 9:51 pm
多謝貓貓, 幫我大忙, 有機會再報答你


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