Math Is Fun Forum
  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

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#1 Re: Help Me ! » Analytical expression of a 2D Fourier transform » 2009-10-17 02:33:11

Check this:

Mathematica 7 - Compute (and visualize) a 2D Discrete-Time Fourier Transform
http://tinyurl.com/yjbeyxq

#2 Re: Dark Discussions at Cafe Infinity » file organization in Windows XP » 2008-08-08 08:22:58

Devantè wrote:

1 TB?!

I claim hax. neutral

Always-on 1Tb:
http://www.westerndigital.com/en/produc … riveid=353

And a couple of 300 Gb internal drives:
http://www.superwarehouse.com/Western_D … L/p/623555

I am thinking about upgrading to 2x500Gb or 1x1Tb internal smile

#3 Re: Dark Discussions at Cafe Infinity » file organization in Windows XP » 2008-08-04 11:54:19

ahhww...the good old times smile

Nowadays 50 Gb sounds like a pen drive tongue

1+ Tb storage space here smile

#4 Re: Euler Avenue » Number Bias » 2008-07-28 15:16:20

JaneFairfax wrote:

And, last but not least, computer scientists use base 2. roll

Oh yeah! big_smile up

#5 Re: Dark Discussions at Cafe Infinity » Batman The Dark Knight » 2008-07-28 15:14:11

infinitebrain wrote:

it's  gonna take me a ton of years before I can watch itfaint

time flies...belive me...rolleyes *nostalgic feeling*

#6 Re: Puzzles and Games » A fun game » 2008-07-27 09:24:24

careless25 wrote:

nice but the game is really meant for stress relieving.
I didnt mean that you write a code for it, i meant how long it takes you to do it in your head.

lool I know big_smile I was just joking smile

#7 Re: Puzzles and Games » A fun game » 2008-07-27 09:05:51

seconds. Beat that.

[ist156948@sigma04:~]$ clisp
  i i i i i i i       ooooo    o        ooooooo   ooooo   ooooo
  I I I I I I I      8     8   8           8     8     o  8    8
  I  \ `+' /  I      8         8           8     8        8    8
   \  `-+-'  /       8         8           8      ooooo   8oooo
    `-__|__-'        8         8           8           8  8
        |            8     o   8           8     o     8  8
  ------+------       ooooo    8oooooo  ooo8ooo   ooooo   8

Copyright (c) Bruno Haible, Michael Stoll 1992, 1993
Copyright (c) Bruno Haible, Marcus Daniels 1994-1997
Copyright (c) Bruno Haible, Pierpaolo Bernardi, Sam Steingold 1998
Copyright (c) Bruno Haible, Sam Steingold 1999-2000
Copyright (c) Sam Steingold, Bruno Haible 2001-2006

[1]> (time (let ((rev (reverse (string "abcdefghijklmnopqrstuvwxyz")))) (dotimes (i 26) (format T "~A~%" (char rev i)))))
z
y
x
w
v
u
t
s
r
q
p
o
n
m
l
k
j
i
h
g
f
e
d
c
b
a
Real time: 6.5E-4 sec.
Run time: 0.0 sec.
Space: 18440 Bytes
NIL
[2]>

Sorry I couldn't resist the geeky post..
roflol

#8 Re: Puzzles and Games » Jane’s quizzes » 2008-07-27 08:52:43

ZHero wrote:

Hey! Why is that everytime i try to write 'D A M N' it shows 'darn'??

Maybe the forum has automatic replacement of "forbidden words". Just a guess.


`s.ex' -> gender
`d.amn' -> darn
`s.hit' -> math

you can see the point.

PS: The last one...lol... ????

#9 Re: Maths Is Fun - Suggestions and Comments » Four In A Line Flash Version » 2008-07-26 04:01:16

orang-jerman wrote:

hi
I also have made program with connect four for school with Java.
But my computer player is much stronger than yours. Yours I can beat all the time with 'hard'.
But never the less it's very nice made.

What search algorithm you use?

#10 Re: Coder's Corner » Best Language to Learn? » 2008-07-26 02:10:12

Ricky wrote:

Vim is hard to use.  I barely know how to use it myself.  But I've seen some friends of mine use it, and they are lighting fast.  If you get good at it, you can type faster on it than with a gui program (like notepad, gui is graphical user interface, as opposed to text like vim).  So it's all just a question about how much effort you want to put in.  Personally, I don't really think it's worth it, though if I get a lot of free time, I'll start trying to learn the in's and out's of vim.

ViM is hard. ViM is powerfull. ViM is fun. ViM is. smile

I started with VIM more than 3 years ago, when I entered university. The learning curve is...not a curve, its a vertical line one has to climb... If you are learning alone, no instructor/friend, its hard.

Things get much easier if you get some friend of yours to teach because you don't get so lost with all the commands and features. You can start working from day zero = )   Some of my friends started using ViM under my guidance, and now they are already teaching it to others! = )

And I will never forget the day pedro `mawreal' lopes told me: "forget emacs, I'll teach you the basics of ViM". cool

The more you learn, the more you *want* to learn! guess what...just like Maths!roflol

#11 Re: Puzzles and Games » Brain Teasers » 2008-07-26 02:05:24

careless25 wrote:
kylekatarn wrote:

2.a)
(...)

smile?

pls hide if u are postin answers.
Yes that is correct and for 2a there are 3 more possibilities!!

done w/ hide button!

Sorry I didn't hide it at first!
Long time passed since I used that feature...lol
rollrolleyes:rolleyes:

I remember the time the hide button was introduced here @ mathisfun, what a usefull tag smile

#13 Re: This is Cool » Zero !!! » 2008-07-20 17:52:51

MathsIsFun wrote:

What a nice fun explanation!

Ricky wrote:

When we introduce infinity, so many things get destroyed that make you want to go back and say, "Ok, let's not add in infinity".

Love it smile

ZHero: You are right that Zero is an amazing number.

Indeed! smile

"A thing that numbers can approach, but not be. "
awesome lol

#14 Re: This is Cool » Divisibility test for 7 & 13... » 2008-07-20 11:12:53

you are really angry today jane...what's wrong? sad
yelling in several posts sad

#16 Re: Exercises » Which is larger » 2008-07-18 08:38:32

amazing number, really tricked me!!!:P

#17 Re: Exercises » Which is larger » 2008-07-18 08:13:21

indeed..  darn rounding errors ::x

#18 Re: Exercises » Which is larger » 2008-07-18 06:43:11

they are equal smile

(if you mean 2*Sqrt(254)..)

#19 Re: This is Cool » end of world » 2008-07-18 06:40:38

Ricky wrote:

Not so welcome.  He was banned before for a reason, and now he's banned again.

oh..sorry then...
I remember him from the long discussions and theories about proving... 0.(9) != 1...loool roflol
but I forgot he was banned (dont remember the reason either)

#20 Re: Help Me ! » Handle.. » 2008-07-18 03:11:04

infinitebrain wrote:

curiosity killed the cat!shame

but the cat has 9 lives...:D

EDIT: lets hope the cat has some spare lifes ...

#21 Re: This is Cool » end of world » 2008-07-18 03:03:29

The style is the same, the signature, the quotes, the initials... Lol:D
I bet he is the famous Anthony "0.(9) != 1" Brown big_smile

Anyway, welcome again, under a new nickname smile

#22 Re: Guestbook » Sega » 2008-07-17 10:51:15

Lexis wrote:

Who think Sonic is cool??? Anyone???
Every tyme Eye play OLD sonic game they say "SEGA"eek
It's SSSSSOOOO stupid
They think it's funyroflolroflol
I tell em' "Stop saying that!!!"swear

vintage stuff rules. smile

#23 Re: Dark Discussions at Cafe Infinity » !"£$%^&*()ing Windows » 2008-07-15 12:07:47

I feel XP much more stable than vista... even excel 2007 gives me lots of problems... sad
If I could I would upgrade back to XP right now...

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