Unicode: 25B4.
Unicode: F764. A textual representation of the ASCII Esc character with code 27.
Using Previous Results Defining Variables Values for Symbols
WheelGraph[n] gives the wheel graph with n vertices W_n.
Unicode: 228E. Infix operator. x ⊎ y is by default interpreted as UnionPlus[x,y]. Used to denote union of multisets, in which multiplicities of elements are added.
DeleteCases[expr, pattern] removes all elements of expr that match pattern. DeleteCases[expr, pattern, levelspec] removes all parts of expr on levels specified by levelspec ...
Arithmetic Numerical Mathematics in Mathematica The Uncertainties of Numerical Mathematics
Widget["Table"] represents a table.