Anisotropic scaling in geometric/Clifford algebra Take the geometric algebra over $\Bbb R^n$. Suppose we have a blade multivector in this algebra. Now we want to anisotropically scale this multivector. Is there a general closed-form expression for performing this operation? I have found similar things for other operations (rotation and etc), but not anisotropic scaling.

Anisotropic scaling is a linear transformation on $\Bbb R^n$ and thus has a well defined outermorphism on $\mathcal G^n$. So if $S$ is your scaling function and $A = a_1 \wedge a_2 \wedge \cdots \wedge a_k$ is your $k$-blade, then $S(A) = S(a_1)\wedge S(a_2)\wedge \cdots \wedge S(a_k)$.