Milan va

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TheRingess (talk) 01:59, 1 December 2007 (UTC)

Mandelbrot

Hi. Thx for improving Mandelbrot article and your program. 1. In your program Mandelbrot there is no SeaUtils utils. 2.Are you sure that notation of derivative is good ( if I'm not wrong this is used for partial derivative )--Adam majewski 12:23, 2 December 2007 (UTC)

I've noticed that and uploaded a new version. Note I'm still working on the program, and I've improved things much yesterday, and I hope to make it better structured somewhat.

A rewrite to Java would be a nice opportunity to do that. What I'd really like is a simple Java applet source, so I could plug my code in. It's about 10 years since I've worked in Java, so I'm not sure how to make a new project and paint pixels. Have you come across some simple Mandelbrot applet on the web?

As for the derivatives, I've tried it with simple "d" instead of "\partial" but it didn't look very nice. Anyway, my math is a bit rusty but I think they actually *are* partial derivatives: it's a multivariate function (of z and c), and derivatives with respect to different variables are taken. Milan va 11:27, 3 December 2007 (UTC)

As for java:

• [| Evgeny Demidov] . programs written in java. You can takeall zipped pages and sources.
• [| OTIS - Java applet by Tomoki KAWAHIRA]

As to derivative: could you look at :

Complex_quadratic_polynomial . Maybe you can add new things ( or remove errors).

I'm not sure if "Complex quadratic polynomial" means the general case of "a x² + b x + c" or only its simplest case "x² + c". I think it's the latter but then the page should be renamed to something like "The simplest complex quadratic polynomial". Then it would be a pretty page. Milan va 11:35, 4 December 2007 (UTC)

As for delphi: maybe you can look : [1] - my program. ? --Adam majewski 16:43, 3 December 2007 (UTC)

Thanks, I'll take a look but I'm quite busy so it may take some time. Milan va 11:35, 4 December 2007 (UTC)

I have uploaded new version and still : "there is no SeaUtils utils" Algorithm is intresting. If you can make documentation I would like to read it. Your program draws iterations, but these iterationsa are on dynamic plane (IMHO it should not be drawn on parameter plane).--Adam majewski 16:51, 3 December 2007 (UTC)

I've put another version there, now it should be OK. As for the iterations, you're right but this way I save space on the screen. It was meant to help me understand what's going on during the evaluation of different points, not to be mathematically correct. I'll try to write a page about the algorithm but I think it'll have to wait until the next weekend. Milan va 11:35, 4 December 2007 (UTC)

I've put together a brief description of the algorithm and put it at my webspace. I hope it gives a good starting point for reading the sources. Milan va (talk) 23:41, 8 December 2007 (UTC)

External ray

Hi. I see that your program draws int and ext rays. Great. I have added it to page about external ray ( without link because spam blacklist stopped it).

Can you write about algorithm of drawing external and int rays ?

I have made a Maxima program with src and algorithm description.

--Adam majewski (talk) 20:04, 26 May 2009 (UTC)