[Gmsh] edge length * 0.5 => number of elements * 6?

[Nico Schlömer]

Hi all,

for a tetrahedral mesh, when scaling the characterstic length by 0.5, I
notice that the number of tetrahedra roughly increases by a factor of 6.
Is this generally true? Does anyone know a reference for this?

Cheers,
Nico
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