Geodesic
Density of Smooth Functions in Anisotropic Weighted Sobolev Spaces with Weights that are Locally Bounded and Locally Bounded Away from Zero
Matematičeskie zametki, Tome 109 (2021) no. 5, pp. 681-690

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The density of smooth functions in weighted Sobolev spaces that are anisotropic with respect to the order of the derivatives and the weight functions is established.
Keywords: density of smooth functions, weighted Sobolev spaces. 
@article{MZM_2021_109_5_a2,
     author = {A. Yu. Golovko},
     title = {Density of {Smooth} {Functions} in {Anisotropic} {Weighted} {Sobolev} {Spaces} with {Weights} that are {Locally} {Bounded} and {Locally} {Bounded} {Away} from {Zero}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {681--690},
     publisher = {mathdoc},
     volume = {109},
     number = {5},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2021_109_5_a2/}
}
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A. Yu. Golovko. Density of Smooth Functions in Anisotropic Weighted Sobolev Spaces with Weights that are Locally Bounded and Locally Bounded Away from Zero. Matematičeskie zametki, Tome 109 (2021) no. 5, pp. 681-690. http://geodesic.mathdoc.fr/item/MZM_2021_109_5_a2/