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If A and B are disjoint from each other's closure, can they be separated by open disjoint sets? The converse is easy, but going from disjoint closure to open sets seems impossible. I don't need the answer, only a confirmation of whether it's right or wrong. Thanks Standard Oil ( talk) 06:30, 6 June 2009 (UTC)
Hello. I recently created Spherical wedge. An image would really brighten and clarify it, I think. For the pleasure of it, and so I know where to go for next time, could someone forward me to an application I might use to construct a sphere and perform operations such as colouring and labelling on it? I'm grateful for any response. — Anonymous Dissident Talk 10:19, 6 June 2009 (UTC)
Mathematics desk | ||
---|---|---|
< June 5 | << May | June | Jul >> | June 7 > |
Welcome to the Wikipedia Mathematics Reference Desk Archives |
---|
The page you are currently viewing is an archive page. While you can leave answers for any questions shown below, please ask new questions on one of the current reference desk pages. |
If A and B are disjoint from each other's closure, can they be separated by open disjoint sets? The converse is easy, but going from disjoint closure to open sets seems impossible. I don't need the answer, only a confirmation of whether it's right or wrong. Thanks Standard Oil ( talk) 06:30, 6 June 2009 (UTC)
Hello. I recently created Spherical wedge. An image would really brighten and clarify it, I think. For the pleasure of it, and so I know where to go for next time, could someone forward me to an application I might use to construct a sphere and perform operations such as colouring and labelling on it? I'm grateful for any response. — Anonymous Dissident Talk 10:19, 6 June 2009 (UTC)