AlternativeHypothesis is an option for hypothesis testing functions like LocationTest that specifies the alternative hypothesis.
p_1 | p_2 | ... is a pattern object which represents any of the patterns p_i.
AnchoredSearch is an option for Find and FindList that specifies whether the text searched for must be at the beginning of a record.
AndersonDarlingTest[data] tests whether data is normally distributed using the Anderson\[Dash]Darling test.AndersonDarlingTest[data, dist] tests whether data is distributed ...
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.
AngerJ
(Built-in Mathematica Symbol) AngerJ[\[Nu], z] gives the Anger function J_v(z).AngerJ[\[Nu], \[Mu], z] gives the associated Anger function J_\[Nu]^\[Mu](z).
AngleBracket[x, y, ...] displays as \[LeftAngleBracket]x, y, ...\[RightAngleBracket].
Animate
(Built-in Mathematica Symbol) Animate[expr, {u, u_min, u_max}] generates an animation of expr in which u varies continuously from u_min to u_max. Animate[expr, {u, u_min, u_max, du}] takes u to vary in ...
AnimationCycleOffset is an option for cells that specifies the relative position of the next graphic to be used in an animation sequence.
AnimationCycleRepetitions is an option for cells that specifies the number of times a given animation cycle should be repeated.