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I want to use a matrix-free matrix to solve a large linear equation system because the matrix is too large to be stored. Petsc user manual describes matrix-free method for SNES with examples. The matrix-free matrices section explains how to set up such a matrix,
but I can't find any example of matrix-free method with KSP. <span style="background-color:rgb(255, 255, 255);display:inline !important">I am wondering how to apply the method to KSP iterative solver in parallel.</span></div>
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<span style="background-color:rgb(255, 255, 255);display:inline !important"><span>I greatly appreciate your help for me to understand this topic. </span></span></div>
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<span style="background-color:rgb(255, 255, 255);display:inline !important"><span>Jiannan Tu</span></span></div>
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