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

You are not logged in.

## #1 2007-02-14 03:34:34

mikau
Member
Registered: 2005-08-22
Posts: 1,504

### Happy Valentine's

Happy Valentine's day to everyone, and a to all the ladies on the forum.

Last edited by mikau (2007-02-14 07:24:14)

A logarithm is just a misspelled algorithm.

Offline

## #2 2007-02-14 03:46:58

John E. Franklin
Member
Registered: 2005-08-29
Posts: 3,588

### Re: Happy Valentine's

Happy Valentine's Day!! I'll have to graph that myself to see the heart form myself...

igloo myrtilles fourmis

Offline

## #3 2007-02-14 04:38:39

mathsyperson
Moderator
Registered: 2005-06-22
Posts: 4,900

### Re: Happy Valentine's

Haha, very nice. How come you've plotted a Polar graph on Cartesian co-ordinates though?

Why did the vector cross the road?
It wanted to be normal.

Offline

## #4 2007-02-14 05:45:37

Zhylliolom
Real Member
Registered: 2005-09-05
Posts: 412

### Re: Happy Valentine's

Haha, I remember Mikau's cardoid.

Offline

## #5 2007-02-14 06:14:12

mikau
Member
Registered: 2005-08-22
Posts: 1,504

### Re: Happy Valentine's

mathsyperson wrote:

Haha, very nice. How come you've plotted a Polar graph on Cartesian co-ordinates though?

Ask the designers of the graphing calculator!

This is just one of a whole mess of heart equations I designed a while back. You might recall this thread: http://www.mathsisfun.com/forum/viewtopic.php?id=3872

(edit) I just modified the equation and graph a bit. Doesn't get much better than that I'd say!

So do any of us math nerds actually have any valentines?

Last edited by mikau (2007-02-14 07:26:06)

A logarithm is just a misspelled algorithm.

Offline

## #6 2007-02-14 07:39:36

Zhylliolom
Real Member
Registered: 2005-09-05
Posts: 412

### Re: Happy Valentine's

I have four of them

Offline

## #7 2007-02-14 08:08:26

mikau
Member
Registered: 2005-08-22
Posts: 1,504

### Re: Happy Valentine's

Dang...

A logarithm is just a misspelled algorithm.

Offline

## #8 2007-02-14 10:30:08

mathsyperson
Moderator
Registered: 2005-06-22
Posts: 4,900

### Re: Happy Valentine's

Ah, that thread must have been made while my internet was broken, making me miss it. Until now, that is. I like how you can change some parameters to get all kinds of different heart shapes. Now you need to figure out how to make them 3D!

According to one of my lecturers, the equation for love can be found as follows:
"Love" pronounced slightly differently becomes "'l'oeuf" (possibly misspelt)
This is French for "The egg."
Eggs are elliptical in shape.

Therefore, the equation for love is x²/a² + y²/b² = 1.

Why did the vector cross the road?
It wanted to be normal.

Offline

## #9 2007-02-14 12:18:19

MathsIsFun
Registered: 2005-01-21
Posts: 7,685

### Re: Happy Valentine's

Ahhh... Valentines and speaking French ...

Husband, trying to be romantic, says "Je t'adore".

Wife responds "Shut the darn door yourself"

"The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  - Leon M. Lederman

Offline

## #10 2007-02-14 17:31:41

mikau
Member
Registered: 2005-08-22
Posts: 1,504

### Re: Happy Valentine's

hehehaha... good one!

A logarithm is just a misspelled algorithm.

Offline

## #11 2007-02-14 17:42:34

Ricky
Moderator
Registered: 2005-12-04
Posts: 3,791

### Re: Happy Valentine's

Zhylliolom wrote:

Haha, I remember Mikau's cardoid.

I like the ring of that.  Mikau's cardioid.

"In the real world, this would be a problem.  But in mathematics, we can just define a place where this problem doesn't exist.  So we'll go ahead and do that now..."

Offline

## #12 2007-02-14 17:48:31

mikau
Member
Registered: 2005-08-22
Posts: 1,504

### Re: Happy Valentine's

I made a whole thread on it in case you didn't see. I might also make a thread on designing shapes using polar equations. I managed to develop some pretty usefull techniques.

A logarithm is just a misspelled algorithm.

Offline

## #13 2007-02-15 07:20:03

espeon
Real Member
Registered: 2006-02-05
Posts: 2,586

### Re: Happy Valentine's

hmmm i hate valentijnes day no offence. its a scam and otherwise for my special case a great event for bullying me! and it did happen! this guy call rick got a piece of paper and wrote roses are red and blablabla and gave it to louis(this REALLY ANNOYING ERO SENNIN WHO SINGS OPERA MUSIC! WORDS CANT EVEN DESCRIBE HOW ANNOYING HE IS!) and said it was from me. that pushed the boundaries and i then cried for 1 hour all the way through history but i got rick in a thursday detention and i missed 20 minuites from french. go me!

Presenting the Prinny dance.
Take this dood! Huh doood!!! HUH DOOOOD!?!? DOOD HUH!!!!!! DOOOOOOOOOOOOOOOOOOOOOOOOOD!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Offline

## #14 2007-02-17 15:48:09

chatalot
Real Member
Registered: 2006-12-23
Posts: 125

### Re: Happy Valentine's

Ahhhh......

I love how people can be the bad guys and yet the still get a very happy ending.

For the world. For your country. For YOU.

Offline

## #15 2007-02-18 02:35:08

Devantè
Real Member
Registered: 2006-07-14
Posts: 6,400

### Re: Happy Valentine's

Necesito los globos. Y un corrazón-bombones. Un beso, beso!

Offline

## #16 2007-02-18 04:50:28

espeon
Real Member
Registered: 2006-02-05
Posts: 2,586

### Re: Happy Valentine's

not really...
and devante i dont know what the heck ur talking about i dont talk spanish or brazilian or whatever youre talking in. all i know is bonbon which is chocalate?

Presenting the Prinny dance.
Take this dood! Huh doood!!! HUH DOOOOD!?!? DOOD HUH!!!!!! DOOOOOOOOOOOOOOOOOOOOOOOOOD!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Offline

## #17 2007-02-18 09:40:18

Devantè
Real Member
Registered: 2006-07-14
Posts: 6,400

### Re: Happy Valentine's

'Bombones' means 'chocolates'.

Also, brazilian isn't a language. O.o

Perhaps you mean portuguese?

Although I was speaking Spanish.

No habla español?

But this topic isn't about Spanish.

I hope everyone had a nice Valentine's Day.

Valentine's Day is not very special to me as I do not celebrate it and it is a normal day for me.

Offline

## #18 2007-02-18 10:44:09

mikau
Member
Registered: 2005-08-22
Posts: 1,504

### Re: Happy Valentine's

I don't celebrate it formally, but heck I see no reason to to ignore it.

It usually depresses me because I never have a valentine.

A logarithm is just a misspelled algorithm.

Offline

## #19 2007-02-18 11:25:29

MathsIsFun
Registered: 2005-01-21
Posts: 7,685

### Re: Happy Valentine's

You will, it is just a matter of time.

"The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  - Leon M. Lederman

Offline

## #20 2007-02-18 18:49:03

Toast
Real Member
Registered: 2006-10-08
Posts: 1,321

### Re: Happy Valentine's

At our school library the librarians were giving a chocolate to everyone who borrowed a book. It was a very tasty day.

Offline

## #21 2007-02-18 18:57:05

justlookingforthemoment
Moderator
Registered: 2005-05-26
Posts: 2,161

### Re: Happy Valentine's

Toast wrote:

It was a very tasty day.

Yes, I agree! Our form teacher gave us all strawberry Freddos ... and we had a Valentine's Day 'party' in Ethics. It was more like an excuse to eat food during class, but it was still good. We got to eat cake while watching 'School Ties' ...

Offline

## #22 2007-02-18 19:10:20

Devantè
Real Member
Registered: 2006-07-14
Posts: 6,400

### Re: Happy Valentine's

I'd rather have had the day off on Valentine's Day...interesting stories!

Offline

## #23 2007-02-18 19:44:27

espeon
Real Member
Registered: 2006-02-05
Posts: 2,586

### Re: Happy Valentine's

i personally think valentines day is a scam

Presenting the Prinny dance.
Take this dood! Huh doood!!! HUH DOOOOD!?!? DOOD HUH!!!!!! DOOOOOOOOOOOOOOOOOOOOOOOOOD!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Offline

## #24 2007-02-18 21:17:10

Devantè
Real Member
Registered: 2006-07-14
Posts: 6,400

### Re: Happy Valentine's

Valentine's Day isn't a scam, there was a person named Valentine. Valentine's Day is a day to remember him.

Offline

## #25 2007-02-18 21:39:06

espeon
Real Member
Registered: 2006-02-05
Posts: 2,586

### Re: Happy Valentine's

well i still think its a scam to get money from children and people.

Presenting the Prinny dance.
Take this dood! Huh doood!!! HUH DOOOOD!?!? DOOD HUH!!!!!! DOOOOOOOOOOOOOOOOOOOOOOOOOD!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Offline