Gregory McColm conjectured that positive elementary inductions are bounded in a class K of nite structures if every (FO + LFP) formula is equivalent to a rst-order formula in K. H...
We study the complexity of expressing the greatest common divisor of n positive numbers as a linear combination of the numbers. We prove the NP-completeness of finding an optimal s...
In this paper, we present techniques for integratingconstraint and direct manipulation approaches to geometric modeling. Direct manipulation positioning techniques are augmented t...
The University of Maryland has recently begun a partnership with Byte Back, a computer skills training program for unemployed and underemployed persons in the Washington, D.C. are...
We present our experience using the Gandalf environment generation system as a prototyping vehicle for the Inscape Environment. Our positive experience included experimentation, i...
Steven S. Popovich, William M. Schell, Dewayne E. ...