Critical Skills Training. Postdoctoral trainees are typically well trained in the technical aspects of their discipline but few receive formal training in leadership. This course will equip you with the critical leadership skills you need to succeed in a wide range of scientific career paths. Interactive Format.
Horseshoe (â, \supset in TeX) is a symbol used to represent: 1  Material conditional in propositional logic. 2  Superset in set theory.
The horseshoe is considered very lucky and used to be hung in many homes to protect and attract good fortune for the family residing inside. As with many superstitions, there are contradictions to be found with the beliefs associated with the horseshoe.