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    Joe Corneli
    @holtzermann17
    $$x+y$$ isn't properly rendered:
    x+yx+y <- shows up as a blank
    Joe Corneli
    @holtzermann17
    Oh, it works if I turn off the Native MathML plugin.
    ksayid
    @ksayid
    hi
    Joe Corneli
    @holtzermann17
    Hi @ksayid thanks for checking in!
    johnpaulguzman
    @johnpaulguzman

    hi, just wanted to ask: is there a logical-ordered listing of the subjects in planetmath? The ordering modes that I've found in the site was order by subject index or alphabetically.

    i'm looking for a list that enumerates all the prerequisite concepts before introducing a new one like:
    01-mappings
    02, 03-surjective map & injective map
    04-bijective map
    05-set of natural numbers
    06-countable set

    Joe Corneli
    @holtzermann17
    Hi @johnpaulguzman thanks for the note! That kind of listing doesn't exist yet but it would be great to develop! What we can make sooner is a simple "term index" that would just list the terms like "surjective map" and so forth (but without the ordering). We could then put them in order based on the way the pages reference each other. I had played around a while ago with making an analysis of the contents according to "depth", just by counting the number of articles that refer to each article. I don't think I have the data from that experiment anymore, but it would be easy to reconstruct. Anyway, "coming soon" - I hope!
    johnpaulguzman
    @johnpaulguzman
    Thanks for the clarification @holtzermann17 .
    Christian N. Hofmann
    @ch180
    hi
    i need a proof of catalan's identity
    Christian N. Hofmann
    @ch180
    found it by myself. bye
    Joe Corneli
    @holtzermann17
    @ch180 - first link by googling "planetmath catalan's identity". Good luck!
    Joe Corneli
    @holtzermann17
    Looks like Native MathML plugin is working now \square.
    LudicSavant
    @LudicSavant
    Hello
    50789
    @50789
    how to do request?
    ajb97
    @ajb97

    Hi there,
    I am looking for a faster algorithm for counting the number of data points that are close to a particular point in k-dimensional hyperspace? The current method of calculating all the distances to data points is too slow for my application to handle.

    (If this should be posted elsewhere then please let me know)
    Thanks in advance

    Ben
    @bhpayne
    @holtzermann17 Is the data for planetphysics available somewhere?
    t-gos7
    @t-gos7
    Hi, I am new here, can I know what does it mean by well defined ?
    ouening
    @ouening
    transfer function
    eachirei
    @eachirei
    Hello
    Can anyone help me with an issue about Scott-continuity?
    eachirei
    @eachirei
    This is what I'm trying to solve; if you could give me any hints I'd be grateful
    Ben
    @bhpayne
    @eachirei -- probably not the best forum for questions like this; see math.stackoverflow. Also, posting homework questions and providing no context of what you've attempted is unlikely to trigger someone to explain the answer.
    genenaden
    @genenaden
    How to look up an article in PlanetMath? I am looking for the article "http://planetmath.org/APointAndACompactSetInAHausdorffSpaceHaveDisjointOpenNeighborhoods"
    The link doesn't work; it takes me to the home page for PlanetMath rather than the article
    AndyYoung27
    @AndyYoung27
    Hi there , nice to meet you all
    Joe Corneli
    @holtzermann17
    @genenaden indeed, that page seems to be missing for some reason. At some point we might be able to track it down.
    abhishekpdeshmukh
    @abhishekpdeshmukh
    how does this chat room work?
    khanrajaat
    @khanrajaat
    Anyone here?
    nunesgrf
    @nunesgrf
    Hi
    Can you guys help me with a proof?
    Nabeegh Ahmed
    @Nabeegh-Ahmed
    @nunesgrf yes??
    ScientificX
    @ScientificX
    Hey guys