This document discusses different types of Turing machines. It describes multi-tape/head Turing machines which have multiple tapes that each have their own independent read/write head. It also describes multi-track Turing machines which have a single tape head that can read and write to multiple tracks on a single tape simultaneously. The document is a presentation on Turing machines given by Sampath Kumar S on November 21, 2017.

1. TURING
MACHINES
(TM)
-Sampath Kumar S,
AP/CSE, SECE

2. Types of Turing Machines
 Multi-Tape/Head Turing Machine
 Multi-track Turing Machine
 Nondeterministic Turing Machine
21 November 2017
Sampath Kumar S, AP/CSE, SECE
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3. Sampath Kumar S, AP/CSE, SECE
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Multi-Tape/Head TM:
 Multi-tape Turing Machines have multiple tapes where
each tape is accessed with a separate head.
 Each head can move independently of the other heads.
 Initially the input is on tape 1 and others are blank.
 At first, the first tape is occupied by the input and the
other tapes are kept blank.
 Next, the machine reads consecutive symbols under its
heads and the TM prints a symbol on each tape and
moves its heads.
21 November 2017

4. Sampath Kumar S, AP/CSE, SECE
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Multi-Tape/Head TM:
21 November 2017

5. Sampath Kumar S, AP/CSE, SECE
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Multi-track Turing Machine:
Multi-track Turing machines, a specific type
of Multi-tape Turing machine, contain
multiple tracks but just one tape head reads
and writes on all tracks.
Here, a single tape head reads n symbols
from n tracks at one step.
It accepts recursively enumerable languages
like a normal single-track single-tape Turing
Machine accepts.
21 November 2017

6. Sampath Kumar S, AP/CSE, SECE
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Multi-track Turing Machine:
21 November 2017

7. 21 November 2017
Sampath Kumar S, AP/CSE, SECE
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8. நன்றி
21 November 2017
Sampath Kumar S, AP/CSE, SECE
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