/sci/ - Science & Math

"the plan has sparked criticism by some Malaysian environmentalists, who fear it might have unforeseen consequences, such as the inadvertent creation of uncontrollable mutated mosquitoes"

Oh no, genetically-modified mosquitoes?? Herpa derp they're gonna mutate into super mosquitoes!!

http://www.dailymail.co.uk/news/article-1350708/Genetically-modified-mosquitoes-released-Malaysia-sp
arks-fears-uncontrollable-new-species.html

I hate that no one really understands what genetic modification means
>mfw

hey sci I ran into some trouble with a few calculations, and I was looking for some help...
does <span class="math">\nabla \cdot \vec{E}=\vec{E} \cdot \nabla[/spoiler]? because I know the dot product is commutative, but the divergence is possibly a special case.

also, if anyone could explain this identity to me, because it's throwing me off:
<div class="math">\frac{1}{2} \nabla {E^2}=\vec{E} \times (\nabla \times \vec{E})+\vec{E} (\vec{E} \cdot \nabla)</div>
I'm using the identity <span class="math">\vec{A} \times (\vec{B} \times \vec {C}) = \vec{B}(\vec{A} \cdot \vec{C}) - \vec{C} (\vec{A} \cdot \vec{B})[/spoiler], which keeps giving me <span class="math">\vec{E} \times (\nabla \times \vec{E}) = \nabla (E^2) - \vec{E}(\vec{E} \cdot \nabla)[/spoiler], so I can't figure out how to get that. Help much appreciated.

>>1102821

my god

>>1070079
> I've only known two black people in my whole life
God fucking damn

>>1014669
>Your waifu is real because she has an effect on you mentally
Jesus fucking christ