And
(Built-in Mathematica Symbol) e_1 && e_2 && ... is the logical AND function. It evaluates its arguments in order, giving False immediately if any of them are False, and True if they are all True.
ClebschGordan[{j_1, m_1}, {j_2, m_2}, {j, m}] gives the Clebsch\[Dash]Gordan coefficient for the decomposition of \[VerticalSeparator] j, m\[RightAngleBracket] in terms of ...
HoldAll
(Built-in Mathematica Symbol) HoldAll is an attribute which specifies that all arguments to a function are to be maintained in an unevaluated form.
HoldPattern[expr] is equivalent to expr for pattern matching, but maintains expr in an unevaluated form.
Or
(Built-in Mathematica Symbol) e_1 || e_2 || ... is the logical OR function. It evaluates its arguments in order, giving True immediately if any of them are True, and False if they are all False.
Unequal
(Built-in Mathematica Symbol) lhs != rhs or lhs != rhs returns False if lhs and rhs are identical.
WordSeparators is an option for Read, Find, and related functions that specifies the list of strings to be taken as delimiters for words.
You can enter complex numbers in Mathematica just by including the constant I, equal to Sqrt[-1]. Make sure that you type a capital I. If you are using notebooks, you can ...
A Clairaut equation is a first-order equation of the form A remarkable feature of this nonlinear equation is that its general solution has a very simple form. This is an ...
NInverseDTFourierTransform[expr, \[Omega], n] gives a numerical approximation to the inverse discrete time Fourier transform of expr evaluated at the integer n, where expr is ...