Math Is Fun Forum
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#251 Re: Puzzles and Games » Wordmorphy » 2013-09-21 09:54:42
Good try ... but prevent->help is a large jump isn't it?
#252 Re: Puzzles and Games » Wordmorphy » 2013-09-20 16:46:09
Thanks!
Preserve -> Support
(Uses a word from above)
#253 Re: Puzzles and Games » Wordmorphy » 2013-09-19 23:00:44
Canyon
Gorge
Bolt (eat fast)
Fix
Repair
(probably not a good answer though)
#254 This is Cool » A Jewel at the Heart of Quantum Physics » 2013-09-17 16:52:26
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- Replies: 1
#255 Re: Maths Is Fun - Suggestions and Comments » Polyhedron Net Animations » 2013-09-17 09:09:07
It is probably a visual effect due to perspective, the coords are the same. I have also found that "Glass" is the best for me.
#256 Re: Maths Is Fun - Suggestions and Comments » Polyhedron Net Animations » 2013-09-17 00:01:08
It let's you rotate the shape by dragging ... but you have to drag the actual shape (not the background) so the mouse sometimes "slips off" the shape as it moves.
#257 Maths Is Fun - Suggestions and Comments » Polyhedron Net Animations » 2013-09-16 22:22:02
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- Replies: 6
After way too much coding time I have finally managed to fulfil an idea I had years ago of animating nets becoming polyhedra (folding and unfolding) for a few select polyhedra:
Comments/suggestions welcome!
#258 Maths Is Fun - Suggestions and Comments » Mathopolis now has Algebra 2 Skills Practice » 2013-09-13 16:44:34
- MathsIsFun
- Replies: 1
Here: Algebra 2 Skills Practice
Have a look over it. Comments/suggestions/corrections all welcome.
Hopefully lots of people will get benefit from this (if they know about it, that is!).
#259 Re: Puzzles and Games » Cars Across the Desert Puzzle » 2013-09-10 22:14:00
No I haven't.
But I have been thinking how to rescue the empty cars.
#260 Puzzles and Games » Number Sequences Puzzle » 2013-09-10 22:12:45
- MathsIsFun
- Replies: 1
Another puzzle: Number Sequences Puzzle
#261 Puzzles and Games » Cars Across the Desert Puzzle » 2013-09-10 17:52:05
- MathsIsFun
- Replies: 6
Another one: Cars Across the Desert Puzzle
#262 Puzzles and Games » 1996 Puzzle » 2013-09-09 23:31:47
- MathsIsFun
- Replies: 2
1996 Puzzle (I hope I got the solutions correct!)
#263 Re: Jokes » Linux Jokes » 2013-08-26 09:15:38
Thanks, funny!
You know you are a Linux user when you want to make one change to an app, and the helpful advice has 6 steps with commands like "sudo apt-get reinstall"
#264 Re: Maths Is Fun - Suggestions and Comments » Absolutely Christmas Crackers Puzzle » 2013-08-24 17:15:29
Thanks both of you, I have amended the puzzle (use refresh): Absolutely Christmas Crackers Puzzle - Solution
#265 Re: Help Me ! » Parabola angle » 2013-08-12 00:22:29
Some info at bottom of this page also: Parabola
#266 Re: Maths Is Fun - Suggestions and Comments » My Maths Project and MIF » 2013-08-07 19:08:24
Good job!
#267 Re: Maths Is Fun - Suggestions and Comments » Implicit Equation Grapher » 2013-08-06 23:01:33
You are welcome, bobby
... Maybe the ability to graph 2 or more equations.
You asked for it, and I have (I hope) managed to do it in the new v0.91 Implicit Equation Grapher
It is quite fun to overlay plots and find similarities between them.
Let me know if it doesn't behave nicely.
#268 Re: Maths Is Fun - Suggestions and Comments » Implicit Equation Grapher » 2013-08-05 13:05:42
I started working on this recently because I wanted to improve it.
I knew that Newton was a possible approach but wasn't convinced. So I started off to see if I could find the slope at any point ... hence the "shaded" plot types. Once I mastered slope I knew it was but a few small steps to Newton.
I was pleasantly surprised by the results, but it was very slow. After some work I was able to speed it up and you see the results.
You and some others over the past 2 years have suggested Newton to me, it just took a while for me to get around to it 
exp(x-y)=0 seems to suffer under the Newton algorithm, values below around exp(-7.5)=5.5e-4 lead to Newton heading towards zero. I will investigate.
#269 Re: Maths Is Fun - Suggestions and Comments » Implicit Equation Grapher » 2013-08-05 11:36:46
Breakthrough!
Was finally able to get Newton-Raphson to work.
Latest version (v0.90) now posted: Implicit Equation Grapher
You can still access the old algorithm (called "SignChange").
The "extra lines" seem to have gone, and (x-y)^2=0 works now.
Would really appreciate everyone testing it (try different functions) to make sure it does the best it can.
#270 Re: Maths Is Fun - Suggestions and Comments » Name change » 2013-08-03 12:30:00
mathaholic is available
#271 Re: Maths Is Fun - Suggestions and Comments » Name change » 2013-08-03 00:31:34
If you wish ... I like your current name fine, but it is totally up to you.
#272 Re: Introductions » draftlotto is here » 2013-08-02 10:24:31
Welcome!
#273 Re: Maths Is Fun - Suggestions and Comments » Implicit Equation Grapher » 2013-07-31 21:09:05
Is that because you have Flash disabled?
#274 Re: Maths Is Fun - Suggestions and Comments » Implicit Equation Grapher » 2013-07-31 21:01:45
First thing I notice is the new warning about the flash player.
What warning?
It is funny about the known bug. That is just y = x and should graph as a straight line. Mathematica will graph it like that, Geogebra too, but other graphers like this one have the same problem
Mathematica and Geogebra may do something analytical with the equation first.
#275 Re: Maths Is Fun - Suggestions and Comments » Implicit Equation Grapher » 2013-07-31 19:09:42
Thanks bob, fixed it. Try refresh now.