Talk:Sunflower fractal: Difference between revisions

Content added Content deleted

Inline

Latest revision as of 12:03, 18 September 2021

This is not a fractal

This is not a fractal. Fractals are self-similar under different magnifications. This pattern is not. It would be more accurate to refer to this task as "Fibonacci packing" or "Phi packing" See http://www.maths.surrey.ac.uk/hosted-sites/R.Knott/Fibonacci/fibnat2.html and https://www.mathsisfun.com/numbers/nature-golden-ratio-fibonacci.html.

Hello,

May I am not right but see the next link:

Fractals in theory and practice

Greetings,

Gal Zsolt

(~ CalmoSoft ~)

That page is simply wrong. This sunflower picture is not a fractal.

In colloquial usage, "fractal" is often taken to mean merely "self-similar", whereas more rigorous usage might also speak of its Hausdorff dimension. Clearly the logarithmic curve is self-similar (zoom the origin to any scale and it looks "same"), but it never gets any more "detailed" - still just a one-dimensional (topologically) line at any scale. (contrast that with what happens when you zoom the Mandelbrot set or a Hilbert curve) But, the real problem here is that the task is insufficiently described anyway - containing only a link to a long-dead page that not even the wayback machine has a copy of. Davbol (talk) 23:51, 7 January 2021 (UTC)

Tasks need a description

In addition to the controversy mentioned on this page about whether this is a fractal, the task description is not adequately explained on the task page and instead is mostly a dead link.

Currently, there's no objective way of determining whether any implementations satisfy the task requirements. --Rdm (talk) 06:44, 18 September 2021 (UTC)

Dead Link

Not only dead, but was originally to a personal Onedrive location. That doesn't seem stable enough to base a task on, as we now know.

--Paddy3118 (talk) 06:48, 18 September 2021 (UTC)

Maybe https://www.google.com/search?q=fibonacci+sunflower+drawing&tbm=isch --Pete Lomax (talk) 11:45, 18 September 2021 (UTC)

To the degree that the varied google results would be some kind of task description, it looks like the task examples here would not satisfy that those task requirements. --Rdm (talk) 11:54, 18 September 2021 (UTC)

Yeah, it is not the best link (got a better one?), but it might be ok for "anything like any of these will do"?

Or maybe collect the existing links scattered throughout the task entries up into the task description. --Pete Lomax (talk) 12:01, 18 September 2021 (UTC)

@@ Line 2: / Line 2: @@
 This is not a fractal. Fractals are self-similar under different magnifications. This pattern is not. It would be more accurate to refer to this task as "Fibonacci packing" or "Phi packing" See http://www.maths.surrey.ac.uk/hosted-sites/R.Knott/Fibonacci/fibnat2.html and https://www.mathsisfun.com/numbers/nature-golden-ratio-fibonacci.html.
-<br>
-Hello,
+: Hello,
+: May I am not right but see the next link:
-<br>
+: [https://www.codeproject.com/Articles/650821/Fractals-in-theory-and-practice Fractals in theory and practice]
-May I am not right but see the next link:
+: Greetings,
-<br>
+: Gal Zsolt
-[https://www.codeproject.com/Articles/650821/Fractals-in-theory-and-practice Fractals in theory and practice]
+: (~ CalmoSoft ~)
-Greetings,
-<br>
+:: That page is simply wrong. This sunflower picture is not a fractal.
-Gal Zsolt
-<y
+::: In colloquial usage, "fractal" is often taken to mean merely "self-similar", whereas more rigorous usage might also speak of its Hausdorff dimension.  Clearly the logarithmic curve is self-similar (zoom the origin to any scale and it looks "same"), but it never gets any more "detailed" - still just a one-dimensional (topologically) line at any scale.  (contrast that with what happens when you zoom the Mandelbrot set or a Hilbert curve)  '''But''', the ''real'' problem here is that the task is insufficiently described ''anyway'' - containing only a link to a long-dead page that not even the wayback machine has a copy of.  [[User:Davbol|Davbol]] ([[User talk:Davbol|talk]]) 23:51, 7 January 2021 (UTC)
-(~ CalmoSoft ~)
+== Tasks need a description ==
+In addition to the controversy mentioned on this page about whether this is a fractal, the task description is not adequately explained on the task page and instead is mostly a dead link.
+Currently, there's no objective way of determining whether any implementations satisfy the task requirements. --[[User:Rdm|Rdm]] ([[User talk:Rdm|talk]]) 06:44, 18 September 2021 (UTC)
+===Dead Link===
+Not only dead, but was originally to a personal Onedrive location. That doesn't seem stable enough to base a task on, as we now know.
+--[[User:Paddy3118|Paddy3118]] ([[User talk:Paddy3118|talk]]) 06:48, 18 September 2021 (UTC)
+:Maybe https://www.google.com/search?q=fibonacci+sunflower+drawing&tbm=isch --[[User:Petelomax|Pete Lomax]] ([[User talk:Petelomax|talk]]) 11:45, 18 September 2021 (UTC)
+::To the degree that the varied google results would be some kind of task description, it looks like the task examples here would not satisfy that those task requirements. --[[User:Rdm|Rdm]] ([[User talk:Rdm|talk]]) 11:54, 18 September 2021 (UTC)
+::: Yeah, it is not the best link (got a better one?), but it might be ok for "anything like any of these will do"?
+::: Or maybe collect the existing links scattered throughout the task entries up into the task description. --[[User:Petelomax|Pete Lomax]] ([[User talk:Petelomax|talk]]) 12:01, 18 September 2021 (UTC)