docs: public static Complex_F64 det(ZMatrixRMaj mat  )
      {
          LUDecompositionAlt_ZDRM alg = new LUDecompositionAlt_ZDRM();
  
          if( alg.inputModified() ) {
              mat = mat.copy();
          }
  
          if( !alg.decompose(mat) )
              return new Complex_F64();
          return alg.computeDeterminant();
      }