Automata theory is study of mathematical properties of abstract computing machine. One of the applications of finite automata is lexical analysis. Researchers proposed rough finite state automata or fuzzy automata as recognizer that accepts imprecise languages. It defines formal languages and decides if any string belongs to the language or not. We have proposed rough fuzzy (final) automata model in this article. This model recognizes rough fuzzy (final) languages. It is suitable as a lexical analyzer when the decision values are fuzzy or can be converted to fuzzy.

1.
L. A.
Zadeh
,
Info. Cont.
8
,
338
353
(
1965
).
2.
Z.
Pawlak
,
Int. J. Comp. Info. Scs.
11
(
5
)
341
355
(
1982
).
3.
D.
Dubois
and
H.
Prade
,
Int. J. Genl Sys.
17
(
2-3
),
191
209
(
1990
).
4.
A.
Mateescu
,
A.
Salomaa
,
Kai
Salomaa
and
S.
Yu
,
J. Univ. Comp. Sci.
1
(
5
)
292
311
(
1995
).
5.
A.
Choubey
and
Ravi
K. M.
,
J. Appl. Math Info.
27
(
1
),
409
417
(
2009
).
6.
G.
Paun
,
L.
Polkowski
and
A.
Skowron
,
Fundamenta Informaticae
,
33
146
162
(
1998
).
7.
S.
Basu
,
Found. Compu. Decision Scs.
28
(
2
)
129
140
(
2003
).
8.
S.
Basu
,
Cyber. Sys.
6
(
2
),
107
124
(
2005
).
9.
Z.
Pawlak
,
Fuzzy Sets and Systems
,
17
(
1
)
99
102
(
1985
).
10.
E. T.
Lee
and
L. A.
Zadeh
,
Info. Scs.
,
1
(
4
),
421
434
(
1969
).
11.
S.
Sharan
and
S. P.
Tiwari
,
Products of Mealy-type rough finite state Machines
, in
Proc. NCCCS, IEEE Explore
(
2012
), pp.
1
5
.
12.
S.
Sharan
and
S. P.
Tiwari
,
Study of rough automata and fuzzy automata
, PhD thesis (
Indian School of Mines Dhanbad
,
2012
).
13.
K.
Tyagi
and
A.
Tripathi
,
Int. J. Fuzzy Sys. App.
6
(
1
)
36
55
(
2017
).
14.
H.J.
Zimmermann
,
Fuzzy Set Theory and Its Applications
(
Kluwer Academic Publishing.
,
1996
)
This content is only available via PDF.
You do not currently have access to this content.