50 replies

Xyzzy · 2009-08-30, 18:52

This is just (another) silly idea to see how long it takes to get 50 unique members to post to a thread.

The rules:

Post an interesting math snippet, using the forum's math rendering engine.
Watch the thread.
Profit!

You may only post once in this thread. If you post a second time it will be deleted.

$\red\fs2 1\:+\:1\:=\:2$

frmky · 2009-08-30, 19:40

$e^{i\pi}=-1$

Batalov · 2009-08-30, 19:59

$B_m=\sum_{k=0}^m\sum_{v=0}^k(-1)^v {k \choose v} \frac{v^m}{k+1}$

Note: \binom doesn't work in your renderer!

10metreh · 2009-08-30, 20:04

IMO, this thread should be deleted.

WraithX · 2009-08-30, 20:17

One of my favorites, 5 mathematical constants in one equation:

$\blue\fs5 e^{(\pi*i)}\:+\:1\:=\:0$

And since that one is already taken, I've seen funny t-shirts like:

$\green\fs5 \int_{10}^{13} 2x\,dx$

$\red\fs5 \int \frac{1}{cabin}\,dcabin = \log cabin$

Or, here's a dangerous one:

$\blue\fs5 2^{\aleph_0} = \aleph_1$

Brian-E · 2009-08-30, 20:17

$\left|\pi-\frac{355}{113}\right|<10^{-6}<br />$

bsquared · 2009-08-30, 20:27

Quote:

Originally Posted by 10metreh

IMO, this thread should be deleted.

Because there's no place for silliness in this world? Excellent point there. Allow me to not invite you out for drinks anytime soon

$y(x) = (ax +b)^2 - n$

retina · 2009-08-31, 01:38

Quote:

Originally Posted by Xyzzy

Post an interesting math snippet, using the forum's math rendering engine.

Note to others: This only works if you allow JS. I don't got any of that JS stuff so ...

a=b
a^2=ab
a^2-b^2=ab-b^2
(a+b)(a-b)=b(a-b)
a+b=b
2b=b
2=1

mdettweiler · 2009-08-31, 02:06

Quote:

Originally Posted by retina

Note to others: This only works if you allow JS. I don't got any of that JS stuff so ...

a=b
a^2=ab
a^2-b^2=ab-b^2
(a+b)(a-b)=b(a-b)
a+b=b
2b=b
2=1

Actually, you can still use the rendering engine; just enclose the text to be rendered in [tex] tags. That's all the little JS button does anyway.

Heck, I rarely use the buttons anyway even though I have JS enabled.

As an example, here's your little snippet rendered with the rendering engine, without the help of any JS buttons.

$a=b$
$a^2=ab$
$a^2-b^2=ab-b^2$
$(a+b)(a-b)=b(a-b)$
$a+b=b$
$2b=b$
$2b=b$
$2=1$

One thing to note is that it seems you need to enclose each individual line of a multi-line selection, or else everything gets run together as one line.

Uncwilly · 2009-08-31, 03:17

$\pi\neq4$

davieddy · 2009-08-31, 03:40

Quote:

Originally Posted by bsquared

Because there's no place for silliness in this world? Excellent point there. Allow me to not invite you out for drinks anytime soon

I endorse this sentiment. It gives me a reason to be cheerful
for living at the end of Buckinghamshire opposite to the Chilterns.

It only just occurred to me that the largest signed 32bit integer
is a famous Mersenne prime.

$Cheers!$

2009-08-30, 18:52	#1
Xyzzy "Mike" Aug 2002 3·2,647 Posts	50 replies This is just (another) silly idea to see how long it takes to get 50 unique members to post to a thread. The rules: Post an interesting math snippet, using the forum's math rendering engine. Watch the thread. Profit! You may only post once in this thread. If you post a second time it will be deleted. $\red\fs2 1\:+\:1\:=\:2$

2009-08-30, 20:17	#6
Brian-E "Brian" Jul 2007 The Netherlands 3269₁₀ Posts	$\left\|\pi-\frac{355}{113}\right\|<10^{-6}<br />$ Last fiddled with by Brian-E on 2009-08-30 at 20:20

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2009-08-30, 19:40	#2
frmky Jul 2003 So Cal 2·13·79 Posts	$e^{i\pi}=-1$

2009-08-30, 19:59	#3
Batalov "Serge" Mar 2008 Phi(4,2^7658614+1)/2 9,257 Posts	$B_m=\sum_{k=0}^m\sum_{v=0}^k(-1)^v {k \choose v} \frac{v^m}{k+1}$ Note: \binom doesn't work in your renderer!

2009-08-30, 20:04	#4
10metreh Nov 2008 4422₈ Posts	IMO, this thread should be deleted.

2009-08-30, 20:17	#5
WraithX Mar 2006 2³×59 Posts	One of my favorites, 5 mathematical constants in one equation: $\blue\fs5 e^{(\pi*i)}\:+\:1\:=\:0$ And since that one is already taken, I've seen funny t-shirts like: $\green\fs5 \int_{10}^{13} 2x\,dx$ $\red\fs5 \int \frac{1}{cabin}\,dcabin = \log cabin$ Or, here's a dangerous one: $\blue\fs5 2^{\aleph_0} = \aleph_1$

2009-08-31, 03:17	#10
Uncwilly 6809 > 6502 """"""""""""""""""" Aug 2003 101×103 Posts 5×11×167 Posts	$\pi\neq4$