Mohit Pandey Posted September 28, 2006 Report Posted September 28, 2006 Triangle.bmpWhat does the triangle used in the equations of physics mean?:) Quote
ronthepon Posted September 28, 2006 Report Posted September 28, 2006 What do you mean? Where did you come across this? Quote
Jay-qu Posted September 28, 2006 Report Posted September 28, 2006 it is delta, or change in some quantity :shrug: Quote
Qfwfq Posted September 28, 2006 Report Posted September 28, 2006 B) Wow! How did you guess that Jay? :shrug: I really couldn't think what triangle he meant. Quote
ronthepon Posted September 28, 2006 Report Posted September 28, 2006 Jay-qu said: it is delta, or change in some quantity ;)Oho! :hihi: That triangle. [math]\Delta[/math] Quote
InfiniteNow Posted September 28, 2006 Report Posted September 28, 2006 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 ... Quote
sanctus Posted September 30, 2006 Report Posted September 30, 2006 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/Deland watch out on the difference between [math]\nabla\cdot r[/math] and [math]\nabla r[/math] Quote
Mohit Pandey Posted September 30, 2006 Author Report Posted September 30, 2006 Thanks for help.:hihi: Quote
InfiniteNow Posted September 30, 2006 Report Posted September 30, 2006 sanctus said: If you don't know the meaning of [math]\nabla[/math] which is called nabla.Not to be confused with NAMBLA... :hihi: Quote
InfiniteNow Posted October 2, 2006 Report Posted October 2, 2006 sanctus said: 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: Quote
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