The hope that mathematical methods employed in the investigation of formal logic would lead to purely computational methods for obtaining mathematical theorems goes back to Leibniz and has been… (More)

computability complexity and languages fundamentals of theoretical computer science What to say and what to do when mostly your friends love reading? Are you the one that don't have such hobby? So,… (More)

The most commonly used method of validating a program is by testing. The programmer typically runs the program on some test cases, and if and when they run correctly, the program is considered to be… (More)

To celebrate the occasion of the twentieth anniversary meeting on Foundations of Computer Science, in October 1979, it was held at a very special location, San Juan, Puerto Rico, and three… (More)

A precise d e f i n i t i o n is g iven of a c lass of inferences in predicate log ic which it la proposed to I d e n t i f y w i t h the c lass of "obvious" In ferences. A mechanism fo r… (More)

It is truly remarkable (Gödel . . . speaks of a kind of miracle) that it has proved possible to give a precise mathematical characterization of the class of processes that can be carried out by… (More)