Set theory - 2016-09-25

in Mathematics, 9 hours ago, by BCLC

I'm looking for a post that contains facts and links to proofs of injections, surjections, etc It's a pretty comprehensive post. It contains a lot about functions such as image of intersection is a subset of intersection of images, image of union is so and so, etc. Please link me

@BCLC Did I understand correctly that you are looking for an already existing post which you saw in the past? If this is the case, I guess this might be the post:

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Q: Overview of basic results about images and preimages

Are there some good overviews of basic facts about images and inverse images of sets under functions?

I have already mentioned the post in your meta question (which you deleted in the meantime): meta.math.stackexchange.com/questions/25064/…

I will also retype here my comment from there, in case it might be useful.

For images and preimages, there is a post which is mentioned here. (BTW it can be found relatively easily by checking the frequent tab for the tag functions.)

I am not sure when I will get to it, but I hope to create similar post for some basic facts about injections, surjections and bijections, too.

@BCLC I am not sure whether you deleted your post because you were satisfied with information given in my comment or for some other reasons.

If you have time, you can let me know whether this is what you were looking for.

As far as I can say after checking the transcript, I do not see reaction to your question in the other rooms.

in Mathematics, 9 hours ago, by BCLC

I'm looking for a post that contains facts and links to proofs of injections, surjections, etc It's a pretty comprehensive post. It contains a lot about functions such as image of intersection is a subset of intersection of images, image of union is so and so, etc. Please link me

in Functional Analysis Study Group, 9 hours ago, by BCLC

I'm looking for a post that contains facts and links to proofs of injections, surjections, etc It's a pretty comprehensive post. It contains a lot about functions such as image of intersection is a subset of intersection of images, image of union is so and so, etc. Please link me

in Calculus and analysis, 9 hours ago, by BCLC

I'm looking for a post that contains facts and links to proofs of injections, surjections, etc It's a pretty comprehensive post. It contains a lot about functions such as image of intersection is a subset of intersection of images, image of union is so and so, etc. Please link me

Transcript for

$Mathematics$ Set theory