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planetmath/00_General

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Joe Corneli

@holtzermann17

$$x+y$$ isn't properly rendered:

x+y

<- shows up as a blank

Joe Corneli

@holtzermann17

Oh, it works if I turn off the Native MathML plugin.

ksayid

@ksayid

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

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

Ben

@bhpayne

@t-gos7 - https://en.wikipedia.org/wiki/Well-defined

eachirei

@eachirei

Hello
Can anyone help me with an issue about Scott-continuity?

https://i.imgur.com/laG5zsi.png

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.