Function outer

Externals/eigen/Eigen/src/SparseCore/SparseBlock.h:385–385

      inline Index index()  const { return Base::index() - (IsRowMajor ? m_block.m_startCol.value() : m_block.m_startRow.value()); }
      inline Index outer()  const { return Base::outer() - (IsRowMajor ? m_block.m_startRow.value() : m_block.m_startCol.value()); }
      inline Index row()    const { return Base::row()   - m_block.m_startRow.value(); }
      inline Index col()    const { return Base::col()   - m_block.m_startCol.value(); }