#### Archived

This topic is now archived and is closed to further replies.

# Typing math

## Recommended Posts

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).

##### Share on other sites

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.)

##### Share on other sites

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.

##### Share on other sites

I'm pretty sure the way we were shown that 0.9999.. = 1 was something along the lines of:

let $$x = 0.\overline{999}$$

then $$\frac{x}{10} = 0.0\overline{999}$$

and $$x - \frac{x}{10} = 0.\overline{999} - 0.0\overline{999} = 0.9$$

so $$\frac{9x}{10} = 0.9$$

Therefore:

$$x = 1$$

##### Share on other sites

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.

##### Share on other sites

I, on the other hand, love singularity

##### Share on other sites

look this$$$\begin{array}{l} S = 1 + 2 + 4 + 6 + 8 + \ldots \\ 2S = 2 + 4 + 6 + 16 + \ldots \\ S = 1 + 2S \\ S - 2S = 1 \\ S = - 1 \\ \end{array}$$$

##### Share on other sites

I should just run away from this forum.

lol.

##### Share on other sites

look this$$$\begin{array}{l} S = 1 + 2 + 4 + 6 + 8 + \ldots \\ 2S = 2 + 4 + 6 + 16 + \ldots \\ S = 1 + 2S \\ S - 2S = 1 \\ S = - 1 \\ \end{array}$$$

Sorry sasa, math errors. You got 2S wrong.

##### Share on other sites

sorry

i mean

$$$\begin{array}{l} S = 1 + 2 + 4 + 8 + 16 + 32 + \ldots \\ 2S = 2\left( {1 + 2 + 4 + 8 + 16 + \ldots } \right) = 2 + 4 + 8 + 16 + 32 \ldots \\ S = 1 + 2S \\ S = - 1 \\ \end{array}$$$

##### Share on other sites

The error in the proof being that you've ignored the last term of S2.

##### Share on other sites

How would I implement latex on my site (much simpler than BB)?

And once implemented how would I use it?

I use Ubuntu Linux.

##### Share on other sites

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.

##### Share on other sites

I still have NO idea how to type using those BB Codes. How can you guys remember them?

##### Share on other sites

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.

##### Share on other sites

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.

##### Share on other sites

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.

##### Share on other sites

$$\sum_{n = 0}^\infty \frac{1}{n!} = \lim_{n\to\infty} \left(1+\frac{1}{n}\right)^n = e$$

Testing...Hey thats cool. I think I'm gonna impress some newbies with that. Maybe get some forum points or something.

##### Share on other sites

Wow and there's me still trying to work out how to do simple division across two tables!!

##### Share on other sites

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.

##### Share on other sites

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").

##### Share on other sites

Okay, so I've disabled that warning now. Clear cache to get the updates (or wait seven days until the cache expires).

##### Share on other sites

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...

×

• #### Activity

• Chat
×
• Create New...