Formal power series

In mathematics, a formal power series is a generalization of a polynomial, where the number of terms is allowed to be infinite; this implies giving up the possibility of replacing the variable in the polynomial with an arbitrary number. Thus a formal power series differs from a polynomial in that it may have infinitely many terms, and differs from a power series, whose variables can take on numerical values. One way to view a formal power series is as an infinite ordered sequence of numbers. In this case, the powers of the variable are used only to indicate the order of the coefficients. The coefficient of is just the fifth term in the series, while the coefficient of is the zeroth term. In combinatorics, formal power series provide representations of numerical sequences and of multisets, and for instance allow concise expressions for recursively defined sequences regardless of whether the recursion can be explicitly solved; this is known as the method of generating functions. More generally, formal power series can include series with any finite number of variables, and with coefficients in an arbitrary ring.

Rx

RX is the telegraph and radio abbreviation for "receive", "receiver" or "reception".

RX, Rx, ℞, or rx may also refer to:

Aeronautica

Computing and electronics

Entertainment and arts

AMD Radeon Rx 200 series

The Rx 200 series is a family of GPUs developed by AMD. A "preview" was seen on September 25, 2013. These GPUs are manufactured on a 28 nm Gate-Last process through TSMC or Common Platform Alliance.

Release

The Rx 200 series was announced on September 25, 2013, at the AMD GPU14 Tech Day event.Non-disclosure agreements were lifted on October 15, except for the R9 290X, and pre-orders opened on October 3.

Architecture

This article is about all products under the AMD Radeon Rx 200 Series brand.