Even with real matrices, eigen values can be complex if matrices are not symmetric. In this case, you need workev. ICB tests: should be OK as it turns out that they do NOT use real+not-sym methods (they use real+sym and complex+non-sym).
Even with real matrices, eigen values can be complex if matrices are not symmetric. In this case, you need workev. ICB tests: should be OK as it turns out that they do NOT use real+not-sym methods (they use real+sym and complex+non-sym).