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Comment by rdlw | Hacker News Reader

Interesting, I only knew it as the del until now

OMG, how did you remember that

  nabla x nabla = labla(ce)?

I think you meant Laplace (Laplacian operator).

That's the mnemonic I was taught, but granted, it takes some artistic license to make it rhyme.

Ha! lol ^^ Ok, I see!

And I thought only ∂ is called "del".

i thought it was the symbol for gradient?

edit: ah, the name of the symbol for the gradient operator is nabla