Fig. 7
From: Multireference diffusion Monte Carlo reaches 2D materials

Comparison of compactness of coefficients between SHDMC and sCI in the sCI:cc-pVQZ basis. The curves labeled sCI:cc-pVQZ and SHDMC-LA demonstrate the compactness of the sCI and SHDMC-LA wavefunctions, respectively, that is achieved by truncating these wavefunctions to contain the number of determinants indicated on the abscissa. The residual norm (ordinate) provides a way to measure the compactness of the sCI and SHDMC-LA wavefunctions.