2
   

"Lévy flight" seems to be a professional term, but what does flight mean here?

Forums:
Email this Topic • Print this Page
 
 
oristarA
 
Reply Sat 16 Jan, 2016 05:41 am
Does "flight" here mean "a series of steps"?

Context:

A Lévy flight, named for French mathematician Paul Lévy, is a random walk in which the step-lengths have a probability distribution that is heavy-tailed. When defined as a walk in a space of dimension greater than one, the steps made are in isotropic random directions.
The term "Lévy flight" was coined by Benoît Mandelbrot,[1] who used this for one specific definition of the distribution of step sizes. He used the term Cauchy flight for the case where the distribution of step sizes is a Cauchy distribution,[2] and Rayleigh flight for when the distribution is a normal distribution[3] (which is not an example of a heavy-tailed probability distribution).

More:
https://en.wikipedia.org/wiki/L%C3%A9vy_flight
  • Topic Stats
  • Top Replies
  • Link to this Topic
Type: Question • Score: 2 • Views: 752 • Replies: 13
No top replies

 
View best answer, chosen by oristarA
Tes yeux noirs
  Selected Answer
 
  2  
Reply Sat 16 Jan, 2016 06:01 am
Yes, it does mean a series of steps.
oristarA
 
  1  
Reply Sat 16 Jan, 2016 06:32 am
@Tes yeux noirs,
Thanks.

BTW, can you see "allows criminals to perform long jumps in between committing crimes with a speed light"? I wonder how criminals can commit crimes in their jumps during competition of long jumps.


Quote:
In this paper, we developed a truncated L´evy flight model to study the crime dynamics. In the discrete case, our model allows criminals to perform long jumps in between committing crimes with a speed light. This is a more realistic extension of a pioneering random walk model by Short et. al

MOre:

http://arxiv.org/pdf/1601.03415.pdf
0 Replies
 
Tes yeux noirs
 
  1  
Reply Sat 16 Jan, 2016 07:42 am
Quote:
in between committing crimes with a speed light

This does not make sense. What is a "speed light"?
timur
 
  1  
Reply Sat 16 Jan, 2016 08:51 am
@Tes yeux noirs,
Even original papers have typos (bad editing).

It's certainly "speed flight". Shorter steps lead to faster "flights".

Tes yeux noirs
 
  1  
Reply Sat 16 Jan, 2016 09:51 am
"committing crimes with a speed flight" doesn't make any sense either.
oristarA
 
  1  
Reply Sat 16 Jan, 2016 10:17 am
@Tes yeux noirs,
Tes yeux noirs wrote:

Quote:
in between committing crimes with a speed light

This does not make sense. What is a "speed light"?



It may refer to speedlight, strobotron in electronics.
oristarA
 
  1  
Reply Sat 16 Jan, 2016 10:21 am
@Tes yeux noirs,
Tes yeux noirs wrote:

"committing crimes with a speed flight" doesn't make any sense either.



My guess is that with the electronic device (a strobotron device), it might interfere with the electronic scoreboard to change the score. But I haven't read the whole article.
0 Replies
 
oristarA
 
  1  
Reply Sat 16 Jan, 2016 10:24 am
@timur,
timur wrote:

Even original papers have typos (bad editing).

It's certainly "speed flight". Shorter steps lead to faster "flights".




It seems there are at least two native English speakers among the authors. So it is less likely that these are grammatical mistakes:

These authors are from DepartmentofMathematics,HarveyMuddCollege,Claremont,CA91711
DepartmentofMathematics,UniversityofCalifornia,LosAngeles,LosAngeles,CA90095.
Ragman
 
  2  
Reply Sat 16 Jan, 2016 10:30 am
@oristarA,
A Speedlite is photographic lighting strobe made by the Canon brand.
There is some logic in the context of what has been written to referring to stop-action by using a strobe.

That being said, however, speed flight is a total mystery to me.
0 Replies
 
Tes yeux noirs
 
  0  
Reply Sat 16 Jan, 2016 10:32 am
@oristarA,
Quote:
It seems there are at least two native English speakers among the authors. So it is less likely that these are grammatical mistakes:

That is a good joke, oristarA.
0 Replies
 
timur
 
  2  
Reply Sat 16 Jan, 2016 12:51 pm
Tes yeux noirs wrote:
"committing crimes with a speed flight" doesn't make any sense either.


Not sure you are understanding the context but who am I to contradict you?

Quantum physics don't make sense either...
Tes yeux noirs
 
  0  
Reply Sat 16 Jan, 2016 01:06 pm
@timur,
I am understanding the context perfectly well. This is not mathemeatical jargon or specialised language; it is nonsense. I do know the difference.
0 Replies
 
NathanGeldner
 
  1  
Reply Sun 4 Sep, 2016 01:37 am
Sorry, speed limit. As in, a finite number of steps moved for each time step in the discrete case. I had to step away from the project 3 months prior for personal reasons and hadn't even realized the paper was on arxiv (missed the email). I feel foolish for not insisting on a final proofread. And yeah, I was the only native speaker actively participating.

-Nathan Geldner
0 Replies
 
 

 
  1. Forums
  2. » "Lévy flight" seems to be a professional term, but what does flight mean here?
Copyright © 2025 MadLab, LLC :: Terms of Service :: Privacy Policy :: Page generated in 0.03 seconds on 02/05/2025 at 02:43:35
▲ ▼