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While the optimization process is working fine in both Examples 5 and 6, the density plot created through libMesh::ExodusII_IO shows a zero density region next to the region where the load is applied.

This might be due to an issue in the geometric filter or some other process.

Travis for merge of PR #30 is failing at the final stage of deploy docs with the following errors.

rsync: delete_file: rmdir(.well-known/acme-challenge) failed: Permission denied (13)
rsync error: some files/attrs were not transferred (see previous errors) (code 23) at main.c(1196) [sender=3.1.2]

I have merged #14 into master to demonstrate topology optimization. The code runs fine in serial using Eigen data structures. This example demonstrates the capability, but currently needs some more work:

• Add documentation with convergence plots and optimal topology
• Verify complex-step sensitivity: While the analytical sensitivity is fine and is able to drive the optimizer, the complex-step sensitivity is giving inaccurate results. This needs to be checked.