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>> No.12109236 [View]
File: 165 KB, 1546x305, hw.png [View same] [iqdb] [saucenao] [google]
12109236

Yo, can anybody help me proceed with my Real Analysis homework? So far I have figured that I ought to take the contrapositive of the first problem, yielding
[math] \forall j \in J, \exists \alpha \in A(Y_\alpha \cap Z_j = \emptyset ) \Longrightarrow \exists \alpha \in A, \forall j \in J (Y_\alpha \cap Z_j = \emptyset )[/math]

but I don't know how J being finite helps me nail this down. I don't think I need contrapositive form for 4b.

>> No.12109224 [View]
File: 165 KB, 1546x305, hw.png [View same] [iqdb] [saucenao] [google]
12109224

Can anybody help me proceed with my Real Analysis homework? So far I have figured that I ought to take the contrapositive of the first problem, yielding
[math] \forall j \in J, \exists \alpha \in A(Y_\alpha \cap Z_j = \emptyset ) \Longrightarrow \exists \alpha \in A, \forall j \in J (Y_\alpha \cap Z_j ) = \emptyset[/math]

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