When Solve cannot find solutions in terms of radicals to polynomial equations, it returns a symbolic form of the result in terms of Root objects. You can get numerical ...

"Manipulating Elements of Lists" shows how you can pick out elements of lists based on their positions. Often, however, you will need to select elements based not on where ...

Simplifying expressions. Mathematica does not automatically simplify an algebraic expression like this. Simplify performs the simplification.

A symmetric polynomial in variables x_1,…,x_n is a polynomial that is invariant under arbitrary permutations of x_1,…,x_n. Polynomials are called elementary symmetric ...

SameObjectQ[object_1, object_2] returns True if and only if the JavaObject expressions object_1 and object_2 refer to the same Java object.

MarshalStringsAs is an option to DefineDLLFunction that specifies how string arguments should be marshaled into the DLL function. This applies to any arguments that are ...

ArcCsc[z] gives the arc cosecant csc -1 (z) of the complex number z.

ArcSinh[z] gives the inverse hyperbolic sine sinh -1 (z) of the complex number z.

ArcTan[z] gives the arc tangent tan -1 (z) of the complex number z. ArcTan[x, y] gives the arc tangent of y/x, taking into account which quadrant the point (x, y) is in.

Erfi[z] gives the imaginary error function erf(i z)/i.