MHB Vectors in $R^3$: Is $\begin{bmatrix}4\\3\\0\end{bmatrix}$ Valid?

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Is $\begin{bmatrix} 4 \\ 3 \\ 0 \end{bmatrix}$ in $R^3$?
 
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bwpbruce said:
Is $\begin{bmatrix} 4 \\ 3 \\ 0 \end{bmatrix}$ in $R^3$?

Yes, it is!
 

Thread 'Confusion about the Moyal-Weyl twist'

I am studying the mathematical formalism behind non-commutative geometry approach to quantum gravity. I was reading about Hopf algebras and their Drinfeld twist with a specific example of the Moyal-Weyl twist defined as F=exp(-iλ/2θ^(μν)∂_μ⊗∂_ν) where λ is a constant parametar and θ antisymmetric constant tensor. {∂_μ} is the basis of the tangent vector space over the underlying spacetime Now, from my understanding the enveloping algebra which appears in the definition of the Hopf algebra...
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