from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A Hebrew stringed instrument.
- n. The symbol ∇, used to denote the gradient operator.
from The Century Dictionary and Cyclopedia
- n. An ancient Egyptian lute with two or three strings. Compare nefer.
Sorry, no etymologies found.
I once wrote "nabla" (an Assyrian harp, term was introduced by the very Anglo Saxon Peter Tait) and I got a very antisemitic reaction to the extent that Jews want to turn everything into something Jewish, even math symbols.
The standard quantization is that momentum p is replaced with the operator (hbar/i) nabla (nabla is a directional derivative) and E = ihbar &/& t (& = partial).
The real part is the instanton component that is a nabla S nabla I, reflecting the small quantum aspect of the spacetime — eg a WKB type of approximation.
Gregor – rachel/nabla is doing her thing with your handle on the Iran thread.
The golden sisirum and the delicately-wrought nabla, the strings of which had long ago been broken, testified to her taste for music, while the broken spindle in the corner, and some unfinished nets of glass beads shewed that she had been fond of woman's usual work.
With regard to nabla (aka del): IE7, Google chrome, and Firefox show it perfectly.
Is there any way to just use a LaTex nabla instead of the HTML version?
Incidentally, this nabla reminds me of an experience I had at WP.
I guess I will just have to get along without nabla.
The \nabla \times on the left side is the [[curl]] operator.
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