Journal of Formalized Mathematics
Volume 11, 1999
University of Bialystok
Copyright (c) 1999 Association of Mizar Users

## Computation of Two Consecutive Program Blocks for SCMPDS

Jing-Chao Chen
Shanghai Jiaotong University

### Summary.

In this article, a program block without halting instructions is called No-StopCode program block. If a program consists of two blocks, where the first block is parahalting (i.e. halt for all states) and No-StopCode, and the second block is parahalting and shiftable, it can be computed by combining the computation results of the two blocks. For a program which consists of a instruction and a block, we obtain a similar conclusion. For a large amount of programs, the computation method given in the article is useful, but it is not suitable to recursive programs.

This research is partially supported by the National Natural Science Foundation of China Grant No. 69873033.

#### MML Identifier: SCMPDS_5

The terminology and notation used in this paper have been introduced in the following articles [13] [17] [5] [6] [15] [2] [10] [11] [14] [12] [4] [9] [16] [7] [1] [8] [3]

#### Contents (PDF format)

1. Preliminaries
2. Non Halting Instructions and Parahalting Instructions
3. Computation of two Consecutive Program Blocks
4. Computation of the Program Consisting of a Instruction and a Block

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