Self-dual, not self-polar

The smallest number of points of an incidence structure which is self-dual but not self-polar is 7. For non-binary structures (where a "point" may occur more than once in a "block") the number is 6.</p

Self-dual not self-polar

AbstractThe smallest number of points of an incidence structure which is self-dual but not self-polar is 7. For non-binary structures (where a “point” may occur more than once in a “block”) the number is 6