/sci/ - Science & Math

>>	Anonymous Thu Jun 14 18:52:16 2012 No.4778870 [View] File: 93 KB, 680x479, pepper.jpg [View same] [iqdb] [saucenao] [google] ITT: science band names.

Anonymous Sat Feb 25 16:35:16 2012 No.4404223 [View]
File: 93 KB, 680x479, pepper.jpg [View same] [iqdb] [saucenao] [google]

Let I1 ⊂ I2 ⊂ I3 ⊂ . . . be ideals in a ring R. Show that I, the union from n = 1 to infinity of In, is also
an ideal.

I real confused /sci/.

For a start, when it says the union from 1 to infinity... do I just show that for every given n, the union is an ideal?

Also... if that's the case, this question is retarded, because clearly for any n the union is just In, which is trivially an ideal.

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/sci/ - Science & Math

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