The best known of Oaxaca's moles is mole negro, which is darker than mole poblano and just as thick and rich. It also includes chocolate, as well as chili peppers, onions, garlic and more, but what makes it distinct is the addition of a plant called hoja santa. It is the most complex and difficult to make of the sauces.
The equivalence of this definition with the earlier one is often called the subgroup condition. For full proof, refer: Sufficiency of subgroup condition. It has two forms (left and right): A subset of a group is termed a subgroup if it is nonempty and is closed under the left quotient of elements. In other words, a subset of a group is termed a subgroup if and only if is nonempty and whenever. A subset of a group is termed a subgroup if it is nonempty and is closed under the right quotient of elements.
Definition. The process whereby something or someone is pushed to the edge of a group and accorded lesser importance. This is predominantly a social phenomenon by which a minority or sub-group is excluded, and their needs or desires ignored.