data/mathematical/276.mml
<math xmlns='http://www.w3.org/1998/Math/MathML' display='inline'><semantics><mrow><mo stretchy="false">(</mo><msub><mi>η</mi> <mrow><mi>μ</mi><mi>ν</mi></mrow></msub><mo stretchy="false">)</mo><mo>=</mo><mi><mrow><mi>d</mi><mi>i</mi><mi>a</mi><mi>g</mi></mrow></mi><mo stretchy="false">(</mo><mo lspace="verythinmathspace" rspace="0em">−</mo><mn>1</mn><mo>,</mo><mn>1</mn><mo>,</mo><mn>1</mn><mo>,</mo><mn>1</mn><mo stretchy="false">)</mo></mrow><annotation encoding='application/x-tex'>(\eta_{\mu\nu}) = \operatorname{diag}(-1,1,1,1)</annotation></semantics></math>