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MatrixXi m(2,2);
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m << 1, 0,
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1, 1;
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cout << "Comparing m with identity matrix:" << endl;
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cout << m.cwiseEqual(MatrixXi::Identity(2,2)) << endl;
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Index count = m.cwiseEqual(MatrixXi::Identity(2,2)).count();
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cout << "Number of coefficients that are equal: " << count << endl;
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