Daniel0 Posted May 10, 2009 Author Share Posted May 10, 2009 Yeah, if you think about it then if you split something up an infinite amount of times, then there is nothing left (a.k.a. zero). Link to comment https://forums.phpfreaks.com/topic/140190-typing-math/page/2/#findComment-831094 Share on other sites More sharing options...
corbin Posted May 11, 2009 Share Posted May 11, 2009 Hrmmm.... Idk.... By that theory... 10 * (1/inf) * inf = 0? (Parenthesis just for looks.) 10 * (0) * inf = 0. Or: 10 * 1 / inf * inf 10 / inf * inf = 0 But.... 1/x * x/1 always = 1, yes? Or does infinity just break every rule? (I should just read the wiki on infinity and stop arguing against things known to be true ;p.) Link to comment https://forums.phpfreaks.com/topic/140190-typing-math/page/2/#findComment-831274 Share on other sites More sharing options...
Daniel0 Posted May 11, 2009 Author Share Posted May 11, 2009 10 * (1/inf) * inf = 0? (Parenthesis just for looks.) 10 * (0) * inf = 0. Or: 10 * 1 / inf * inf 10 / inf * inf = 0 The results of all that is undefined because you cannot multiply 0 with infinity. Link to comment https://forums.phpfreaks.com/topic/140190-typing-math/page/2/#findComment-831378 Share on other sites More sharing options...
GingerRobot Posted May 11, 2009 Share Posted May 11, 2009 I'm pretty sure the way we were shown that 0.9999.. = 1 was something along the lines of: let [tex]x = 0.\overline{999}[/tex] then [tex]\frac{x}{10} = 0.0\overline{999}[/tex] and [tex]x - \frac{x}{10} = 0.\overline{999} - 0.0\overline{999} = 0.9[/tex] so [tex]\frac{9x}{10} = 0.9[/tex] Therefore: [tex] x = 1[/tex] Link to comment https://forums.phpfreaks.com/topic/140190-typing-math/page/2/#findComment-831438 Share on other sites More sharing options...
corbin Posted May 11, 2009 Share Posted May 11, 2009 10 * (1/inf) * inf = 0? (Parenthesis just for looks.) 10 * (0) * inf = 0. Or: 10 * 1 / inf * inf 10 / inf * inf = 0 The results of all that is undefined because you cannot multiply 0 with infinity. I now hate infinity. Link to comment https://forums.phpfreaks.com/topic/140190-typing-math/page/2/#findComment-831920 Share on other sites More sharing options...
Mchl Posted May 11, 2009 Share Posted May 11, 2009 I, on the other hand, love singularity Link to comment https://forums.phpfreaks.com/topic/140190-typing-math/page/2/#findComment-831926 Share on other sites More sharing options...
sasa Posted May 11, 2009 Share Posted May 11, 2009 look this[tex]\[ \begin{array}{l} S = 1 + 2 + 4 + 6 + 8 + \ldots \\ 2S = 2 + 4 + 6 + 16 + \ldots \\ S = 1 + 2S \\ S - 2S = 1 \\ S = - 1 \\ \end{array} \] [/tex] Link to comment https://forums.phpfreaks.com/topic/140190-typing-math/page/2/#findComment-831949 Share on other sites More sharing options...
corbin Posted May 12, 2009 Share Posted May 12, 2009 I should just run away from this forum. lol. Link to comment https://forums.phpfreaks.com/topic/140190-typing-math/page/2/#findComment-832075 Share on other sites More sharing options...
Ken2k7 Posted May 12, 2009 Share Posted May 12, 2009 look this[tex]\[ \begin{array}{l} S = 1 + 2 + 4 + 6 + 8 + \ldots \\ 2S = 2 + 4 + 6 + 16 + \ldots \\ S = 1 + 2S \\ S - 2S = 1 \\ S = - 1 \\ \end{array} \] [/tex] Sorry sasa, math errors. You got 2S wrong. Link to comment https://forums.phpfreaks.com/topic/140190-typing-math/page/2/#findComment-832077 Share on other sites More sharing options...
sasa Posted May 12, 2009 Share Posted May 12, 2009 sorry i mean [tex]\[ \begin{array}{l} S = 1 + 2 + 4 + 8 + 16 + 32 + \ldots \\ 2S = 2\left( {1 + 2 + 4 + 8 + 16 + \ldots } \right) = 2 + 4 + 8 + 16 + 32 \ldots \\ S = 1 + 2S \\ S = - 1 \\ \end{array} \] [/tex] Link to comment https://forums.phpfreaks.com/topic/140190-typing-math/page/2/#findComment-832162 Share on other sites More sharing options...
GingerRobot Posted May 12, 2009 Share Posted May 12, 2009 The error in the proof being that you've ignored the last term of S2. Link to comment https://forums.phpfreaks.com/topic/140190-typing-math/page/2/#findComment-832222 Share on other sites More sharing options...
enedene Posted June 11, 2009 Share Posted June 11, 2009 How would I implement latex on my site (much simpler than BB)? And once implemented how would I use it? I use Ubuntu Linux. Link to comment https://forums.phpfreaks.com/topic/140190-typing-math/page/2/#findComment-853624 Share on other sites More sharing options...
Daniel0 Posted June 11, 2009 Author Share Posted June 11, 2009 The bbcode here simply just passes the TeX string to an external parser. Actually doing it from scratch is less trivial (search Google). There is also jsMath, which you can use. Link to comment https://forums.phpfreaks.com/topic/140190-typing-math/page/2/#findComment-853625 Share on other sites More sharing options...
Ken2k7 Posted June 12, 2009 Share Posted June 12, 2009 I still have NO idea how to type using those BB Codes. How can you guys remember them? Link to comment https://forums.phpfreaks.com/topic/140190-typing-math/page/2/#findComment-854242 Share on other sites More sharing options...
Daniel0 Posted June 12, 2009 Author Share Posted June 12, 2009 I've used them extensively when writing math for other purposes. LaTeX is a typesetting language that only has semantic meaning, kind of like HTML has. Things like typography, layout, hyphenation, etc. is done automatically. Link to comment https://forums.phpfreaks.com/topic/140190-typing-math/page/2/#findComment-854282 Share on other sites More sharing options...
GingerRobot Posted June 12, 2009 Share Posted June 12, 2009 LaTeX is also used extensively in scientific papers, journals and the like. I guess i'm really going to have to get to grips with it at some point. Link to comment https://forums.phpfreaks.com/topic/140190-typing-math/page/2/#findComment-854336 Share on other sites More sharing options...
Daniel0 Posted June 12, 2009 Author Share Posted June 12, 2009 There is an editor called LyX which you can use if you don't feel like typing it in plain text. I believe they call it a WYSIWYM (what you see is what you mean) editor. I think it's available on all platforms. You can of course also just use vim and the CLI. Link to comment https://forums.phpfreaks.com/topic/140190-typing-math/page/2/#findComment-854343 Share on other sites More sharing options...
PugJr Posted June 13, 2009 Share Posted June 13, 2009 [tex]\sum_{n = 0}^\infty \frac{1}{n!} = \lim_{n\to\infty} \left(1+\frac{1}{n}\right)^n = e[/tex] Testing...Hey thats cool. I think I'm gonna impress some newbies with that. Maybe get some forum points or something. Link to comment https://forums.phpfreaks.com/topic/140190-typing-math/page/2/#findComment-855039 Share on other sites More sharing options...
Daniel0 Posted September 18, 2009 Author Share Posted September 18, 2009 Updated to use jsMath. See first post for more info. Link to comment https://forums.phpfreaks.com/topic/140190-typing-math/page/2/#findComment-920629 Share on other sites More sharing options...
PHP_Idiot Posted October 17, 2009 Share Posted October 17, 2009 Wow and there's me still trying to work out how to do simple division across two tables!! Link to comment https://forums.phpfreaks.com/topic/140190-typing-math/page/2/#findComment-938898 Share on other sites More sharing options...
Mchl Posted October 22, 2009 Share Posted October 22, 2009 I occasionally get this meassage at the top of forum No jsMath TeX fonts found -- using image fonts instead. These may be slow and might not print well. Use the jsMath control panel to get additional information. Link to comment https://forums.phpfreaks.com/topic/140190-typing-math/page/2/#findComment-941850 Share on other sites More sharing options...
Daniel0 Posted October 22, 2009 Author Share Posted October 22, 2009 That would be when someone has used jsMath in a post. Either install the jsMath TeX fonts, or see if the notice can be disabled in the mentioned control panel (note the little button in the bottom right corner saying "jsMath"). Link to comment https://forums.phpfreaks.com/topic/140190-typing-math/page/2/#findComment-941854 Share on other sites More sharing options...
Daniel0 Posted October 22, 2009 Author Share Posted October 22, 2009 Okay, so I've disabled that warning now. Clear cache to get the updates (or wait seven days until the cache expires). Link to comment https://forums.phpfreaks.com/topic/140190-typing-math/page/2/#findComment-941860 Share on other sites More sharing options...
shamuraq Posted December 6, 2011 Share Posted December 6, 2011 If i would like to add this functionality to my app, 1.how do i go about installing? 2. Are the tutorials for this? 3. Could it be done on my localhost? 4. Could it be applied to a shared server without having to get the administrator to do it fer u? I'm really a noob so i do apologise if i sound stupid... Thanx guys... Link to comment https://forums.phpfreaks.com/topic/140190-typing-math/page/2/#findComment-1294918 Share on other sites More sharing options...
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