The word "decidable" has two distinct meanings in mathematics. The first meaning came from logic. A set of axioms is a set of statements that are regarded as true in the system for which the axioms hold. If a statement in the language of the system can...

A logical system or theory is decidable if the set of all well-formed formulas valid in the system is decidable. That is, there exists an effective method such that for every formula in the system the method is capable of deciding whether the formula is...

Mark T. Hoske, Editor-in-Chief Programmable logic controllers (PLCs) dominate among available manufacturing computing hardware, and Ethernet physical media is becoming the primary way to communicate those decisions, suggests recent Control Engineering research. Decide : If anyone thought PLCs are being removed...

ATTACK ON AMERICA TERRORISTS Logical, deliberate, devoted Scripps Howard News Service Friday, September 14, 2001 When most people picture a terrorist, they imagine a sadistic madman like the Russian hijacker played by Gary Oldman in the movie "Air Force...

When it comes to dealing with the possibility of removing Alan Hevesi, it already seems clear what direction they're going to be pushing him in. The 18-member committee Spitzer has formed to advise him on government reform includes a number of people who have already...

Price-Fixing: A Wisconsin station owner sells gasoline at a discount to senior citizens. And what does he get in return? A commendation from the city council? No, he's told that he's in violation of the law.Raj Bhandari has been allowing senior citizens a 2-cent discount...