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Thread: Katex

  1. #26
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    Quote Originally Posted by Sin View Post
    Ah yeah I admit I did miss that, but wouldn't my point remain the same? 2h is still 0 when h is 0.
    but who says h equals 0. Beside, we just agreed h can't be 0 right? Tbh, I think that limit isn't supposed to be their. h can be 0.

    Now about the differnce quotient.



    because



    assuming f(x) returns the y value

    But how can you suddenly use h as dx?
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    Agreed, h cannot be 0. However, when you're dealing with a limit, h is an infinitely small number approaching zero. In that case, 2(h) is negligible and doesn't need to be included in the derivative.
    I'm on my phone so Katex is gonna be annoying, bear with me :P

    Let's take x^2 as an example, the derivative of that is obviously 2x.
    If we use the first principle of derivatives to actually calculate the derivative, we'd get
    lim(h -> 0) (2xh + h^2)/h

    which gives you

    lim(h->0) 2x + h

    And so you treat h as 0 which gives you f'(x) = 2x.

    My whole point is that the h is such a small negligible number (funnily enough there's no smallest positive/negative number) and so we treat it as 0.

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    Quote Originally Posted by elfyyy View Post
    I know I am
    Good I'll pop onto my srl skype more soon...
    Quote Originally Posted by The Mayor View Post
    Because you've been missing in action?
    Yeah... but tbh I was meant to mention @hoodz which is a bit awkward now...
    But gz on SSRL

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    Quote Originally Posted by The Killer View Post
    Good I'll pop onto my srl skype more soon...

    Yeah... but tbh I was meant to mention @hoodz which is a bit awkward now...
    But gz on SSRL
    i told you mom it already.

  5. #30
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    Quote Originally Posted by Sin View Post
    The derivative of
    if i'm doing my integrals correctly.
    You are.. doing them correct..

    This IS the correct answer. h can be 0 or whatever the limit is.. When you get rid of all on the bottom, you are allowed to substitute the limit for h. You are then left with the solution you have above.

    Just because it is a limit, does not mean that it has to be close as possible without actually being.. So you are right.

    Can even try it in wolframalpha.


    Example of the derivative formula being used and h being eliminated by substitution of the limit: http://tutorial.math.lamar.edu/Class...erivative.aspx
    Last edited by Brandon; 11-02-2014 at 03:22 PM.
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  6. #31
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    @core; After some testing I don't think it's a css conflict, might just be some javascript. Could prob be fixed by moving katex css and js to the end of the page.

    Quote Originally Posted by Brandon View Post
    You are.. doing them correct..

    This IS the correct answer. h can be 0 or whatever the limit is.. When you get rid of all on the bottom, you are allowed to substitute the limit for h. You are then left with the solution you have above.

    Just because it is a limit, does not mean that it has to be close as possible without actually being.. So you are right.

    Can even try it in wolframalpha.


    Example of the derivative formula being used and h being eliminated by substitution of the limit: http://tutorial.math.lamar.edu/Class...erivative.aspx
    Heh, it was stolen from my katex example that I showed core. http://dgby.org/katex-test/
    Last edited by Dgby714; 11-26-2014 at 01:49 PM.

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  7. #32
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    Quote Originally Posted by Dgby714 View Post
    @core; After some testing I don't think it's a css conflict, might just be some javascript. Could prob be fixed by moving katex css and js to the end of the page.
    That would require modifying templates instead of isolating all of the changes within the confines of BBcode. Changing templates is annoying, as well as keeping those changes synced across all templates and with any updates that might happen to the BBcode would be too much of an extra maintenance burden and isn't feasible.

    If you can find a way to fix this issue, I'm all ears; but whatever changes will likely need to be colocated in the BBcode functionality.

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  8. #33
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    Quote Originally Posted by Dgby714 View Post
    @core; After some testing I don't think it's a css conflict, might just be some javascript. Could prob be fixed by moving katex css and js to the end of the page.
    @Dgby714; made a plugin that seems to fix these issues. I added it to the forum and it seems to be working. Thanks @Dgby714;!

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    Quote Originally Posted by core View Post
    @Dgby714; made a plugin that seems to fix these issues. I added it to the forum and it seems to be working. Thanks @Dgby714;!
    =)
    Needs to be longer than 3 characters...

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  10. #35
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    Wow that is a pretty awesome tag to have It uses similar notation as a Javascript library I used in one of my Android apps to display Math questions (jqMath). It seems that Katex does server side rendering though and one of the main reason I used jqMath was to require no internet connection at all.

    Script source code available here: Github

  11. #36
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    Quote Originally Posted by J J View Post
    Wow that is a pretty awesome tag to have It uses similar notation as a Javascript library I used in one of my Android apps to display Math questions (jqMath). It seems that Katex does server side rendering though and one of the main reason I used jqMath was to require no internet connection at all.
    It's using js, it's all done client-side. The "notation" is TeX.

    The plugin I wrote just removes a lot of redundancy with core's tag and I added some css changes to fix the issues.

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