00:01
This question we have to discuss that first is let let q obi collection of the subset of ir which includes the empty set all complete to finite and there is subset is finite.
00:23
There is pi is finite.
00:27
Then firstly there is five belongs to q second.
00:34
As phi is finite and 5 c is equal to ir belongs to q and third is let a1 a2 dot a n belongs to q that is a 1 a 2 and here is a n is 1 finite subset of now here is a 1 belongs to a 2 belongs to then after that here is a1 union a2 that union a n power c as a1 da da da n one finite set a 1 a2 da da da a n this finite union so here is a one union a 2 dot that union a n is finite union a n is finite union of finite set is a finite then a one intersection a two intersection dot dot dot a n belongs to q intersection of any finite number of member of q is still belongs to q then we take the fourth and next in the next section there is a fourth question here is fourth question here that is the question that first let a be indexed.
02:13
Then here is a, i, c, here is i belongs to a, that is bn, arbitrary collection of subset ir.
02:31
Then after that in q.
02:33
And a lies in e is a finite, as a union, there's u, ai, c, that is i belongs to a, here is i belongs to this i that is belong to q as intersection of finite collection, of finite set is finite...