It is known that the problem is APX-hard for general graphs and NP-hard for planar graphs.

此问题在一般图下是APX困难问题，在平面图下是NP困难问题。

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Since we prove the problems are NP-complete and APX-complete, we propose three heuristic algorithms to solve them.

我们证明了这个问题不仅是NP完全的同时也是APX完全的，因此我们提出了三种启发式算法解决此问题。

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APX Alias Cell Number 5) (aliascsno) This field represents the AUTOPLEX system alias cell number for a cell in another system.

该字段表示另一个系统内某个小区的autoplex系统别名小区号。

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In September ICE bought 79 percent of a gas and power derivatives business based in the Netherlands, a business which had been a part of APX Endex.

FORBES: IntercontinentalExchange (ICE) Merger With NYSE Euronext Will Reshape Markets

The Tegra 650, announced Sunday, will join a previously announced Nvidia chip, the APX 2500, to make up a a new product line for the Santa Clara, Calif.

FORBES: Intel, Nvidia Fight Over Gadgets

Epson's 3D display glasses, the Moverio BT-100 have been floating around as a development platform for a couple years, and APX Labs is the latest to hack the headset.

ENGADGET