Talk:Maximally stable extremal regions
|WikiProject Robotics||(Rated Start-class, Mid-importance)|
Hi, In this article, I have an objection to using the formula .
I know it's in the paper by Matas but as all Q are sets, I have no idea what the operator / is supposed to mean. If this is not simply due to my lack of mathematical understanding, it would be good to clarify what is meant by this expression. —Preceding unsigned comment added by 126.96.36.199 (talk) 11:34, 10 February 2010 (UTC)
I don't agree that the division symbol needs explaining. However, perhaps you have misunderstood what is here. The pipes |.|, which denote cardinality, turn the sets into normal real numbers. Thus, the division sign is then just a normal division. If anything, perhaps the |.| needs to be explained. Blackshadowshade (talk) 16:01, 7 May 2010 (UTC)
Misleading definition of totally ordered set
According to https://en.wikipedia.org/wiki/Total_order , totally ordered set is a set X that has relation, that is antisymmetric, transitive and total. With the given definition without totality (antisymmetric, transitive, reflexive), there can be pairs of different elements from X that are not related to each other. Totality implies reflexivity.