If you mean the symbol â, it means âcontains as an elementâ. The expression Aâx is equivalent to xâA, which means that x is an element of A and implies that A is a set. See Element (mathematics).
Concrete Floor Care 101. Concrete flooring is one of the most durable types of flooring you can install in your homeânot to mention it adds an interesting design element that is both contemporary and uncommon. Itâs also easy to maintain if you follow a few simple guidelines.
Stone is another popular option for flooring. It comes in a wide array of colors and patterns and has a natural, timeless beauty. It is nearly indestructible and can add an elegant (polished marble), or rustic (uneven slate) look. Granite is probably the best choice because it's the hardest stone.