GeodesyData["name", " property"] gives the value of the specified property for a named geodetic datum or reference ellipsoid.GeodesyData[{a, b}, " property"] gives the value ...

Likelihood[dist, {x_1, x_2, ...}] gives the likelihood function for observations x_1, x_2, ... from the distribution dist.

x + y + z represents a sum of terms.

SetAccuracy[expr, a] yields a version of expr in which all numbers have been set to have accuracy a.

f /: lhs := rhs assigns rhs to be the delayed value of lhs, and associates the assignment with the symbol f.

TautologyQ[bf] gives True if all combinations of values of variables make the Boolean function bf yield True.TautologyQ[expr, {a_1, a_2, ...}] gives True if all combinations ...

Converting between strings, boxes, and expressions. Here is a simple expression. This gives the InputForm of the expression as a string.

If you have an equation like 2x==0, it is perfectly clear that the only possible solution is x->0. However, if you have an equation like ax==0, things are not so clear. If a ...

Some common operations on special functions. Most special functions have simpler forms when given certain specific arguments. Mathematica will automatically simplify special ...

Every new version of Mathematica contains many new features. But careful design from the outset has allowed nearly total compatibility to be maintained between all versions. ...