- +--------------++---------+--------------+--------------+
- | * || e(0, 0) | e(1, (0, 0)) | e(1, (1, 0)) |
- +==============++=========+==============+==============+
- | e(0, 0) || e(0, 0) | 0 | 0 |
- +--------------++---------+--------------+--------------+
- | e(1, (0, 0)) || 0 | e(1, (0, 0)) | 0 |
- +--------------++---------+--------------+--------------+
- | e(1, (1, 0)) || 0 | 0 | e(1, (1, 0)) |
- +--------------++---------+--------------+--------------+