TraceOff is an option for Trace and related functions which specifies forms inside which tracing should be switched off.
TraceOn
(Built-in Mathematica Symbol) TraceOn is an option for Trace and related functions which specifies when tracing should be switched on.
Unevaluated[expr] represents the unevaluated form of expr when it appears as the argument to a function.
Unset
(Built-in Mathematica Symbol) lhs =. removes any rules defined for lhs.
Variables[poly] gives a list of all independent variables in a polynomial.
VertexDelete[g, v] makes a graph by deleting the vertex \[Nu] and all edges connected to v from the graph g.VertexDelete[g, {v_1, v_2, ...}] deletes a collection of vertices ...
ViewVertical is an option for Graphics3D and related functions which specifies what direction in scaled coordinates should be vertical in the final image.
Write
(Built-in Mathematica Symbol) Write[channel, expr_1, expr_2, ...] writes the expressions expr_i in sequence, followed by a newline, to the specified output channel.
$CharacterEncodings gives the list of character encodings that can be used.
$ContextPath is a global variable that gives a list of contexts, after $Context, to search in trying to find a symbol that has been entered.