Meaning

[Mohit Pandey]

Triangle.bmpWhat does the triangle used in the equations of physics mean?:)

[ronthepon]

What do you mean?

 

Where did you come across this?

[Jay-qu]

it is delta, or change in some quantity :shrug:

[Qfwfq]

B) Wow! How did you guess that Jay?

 

:shrug: I really couldn't think what triangle he meant.

[ronthepon]

it is delta, or change in some quantity ;)

Oho! :hihi:

 

That triangle.

 

[math]\Delta[/math]

[InfiniteNow]

Basically if n = 3 converts after some duration to n = 4, then [math]\Delta[/math]n = +1

 

 

If n = 10 converts after some duration to n = 3, then [math]\Delta[/math]n = -7

 

 

... and as pointed out in posts above would be read as "change in" n equals, or, delta n equals ...

[sanctus]

But you al forgot the other meaning of the triangle it's also the [math]\nabla^2[/math] or written better [math]\nabla\cdot\nabla[/math]. That means if you have a a spatial vector r (in the canonical basis) then:

[math]\Delta r \equiv \partial_x^2 r+\partial_y^2 r+\partial_z^2 r[/math]

 

And if I remember right it's called the Lorentzian...

 

If you don't know the meaning of [math]\nabla[/math] which is called nabla. See http://en.wikipedia.org/wiki/Del

and watch out on the difference between [math]\nabla\cdot r[/math] and [math]\nabla r[/math]

[Mohit Pandey]

Thanks for help.:hihi:

[InfiniteNow]

If you don't know the meaning of [math]\nabla[/math] which is called nabla.

Not to be confused with NAMBLA... :hihi:

[sanctus]

What is NAMBLA?

[InfiniteNow]

What is NAMBLA?

The quick answer is, it's really tough to be okay with the thoughts expressed by this group. The extended answer is found in wiki...

 

http://en.wikipedia.org/wiki/Nambla

 

:)

 

 

Cheers. :cup: