expr //. rules repeatedly performs replacements until expr no longer changes.
SameQ
(Built-in Mathematica Symbol) lhs === rhs yields True if the expression lhs is identical to rhs, and yields False otherwise.
StringFormat["string"] attempts to determine what ImportString format could be used to import the string " string".
UnsameQ
(Built-in Mathematica Symbol) lhs =!= rhs yields True if the expression lhs is not identical to rhs, and yields False otherwise.
ValueQ
(Built-in Mathematica Symbol) ValueQ[expr] gives True if a value has been defined for expr, and gives False otherwise.
Characters["string"] gives a list of the characters in a string.
Recall that connections to remote kernels, as opened by LaunchKernels, are represented as kernel objects. See the chapter Connection Methods for details. The commands in this ...
Cashflow[{c_0, c_1, ..., c_n}] represents a series of cash flows occurring at unit time intervals.Cashflow[{c_0, c_1, ..., c_n}, q] represents cash flows occurring at time ...
FiniteGroupData[name, " property"] gives the value of the specified property for the finite group specified by name.FiniteGroupData["class"] gives a list of finite groups in ...
LatticeData[lattice, " property"] gives the specified property for a lattice.LatticeData[n] gives a list of named lattices of dimension n.