ag-gipp/GoUldI

Syntax::sntxf: "(" cannot be followed by "-1, 1, 1, 1)".

ToExpression::esntx: Could not parse (\eta_{\mu\nu})=\diag(-1,1,1,1) as input.

<math 
  xmlns='http://www.w3.org/1998/Math/MathML'>
  <semantics>
    <mi>$Failed</mi>
    <annotation-xml encoding='MathML-Content'>
      <ci>$Failed</ci>
    </annotation-xml>
  </semantics>
</math>