Smoothing and Regularization with Modified Sparse Approximate Inverses

Figure 1

Smoothing factor 𝜇 against subspace weight 𝜌. (a) considers MSPAI using global probing conditions for the constant coefficient system 𝐴₁ of size 𝑛=10³. (b) shows MSPAI using global probing vectors with action on 𝐵₁ with varying coefficients of size 𝑛=10³. MSPAI is compared to Jacobi, SPAI, and 𝑀3_opt (16).

(a) MSPAI with global probing conditions for 𝐴₁

(b) MSPAI using global probing vectors with action on 𝐵₁