Intersection Process of Two DFAs | Theory of Computation - Computer Science Engineering (CSE) PDF Download

Introduction

  • Let’s understand the intersection of two DFA with an example. 
  • Designing a DFA for the set of string over {0, 1} such that it ends with 01 and has even number 0f 1’s. 

There two desired language will be formed:

L1= {01, 001, 101, 0101, 1001, 1101, ....} 

L2= {11, 011, 101, 110, 0011, 1100, .....}

L = L1 and L2 = L1 ∩ L2

State Transition Diagram for the language L1 :
This is a DFA for language L1
Intersection Process of Two DFAs | Theory of Computation - Computer Science Engineering (CSE)

It accepts all the string that accept 01 at end. 

State Transition Diagram for the language L2 : 
This is a DFA for language L2 
Intersection Process of Two DFAs | Theory of Computation - Computer Science Engineering (CSE)

It accepts all the string that accept with even number of 1’s.
State Transition Diagram of L1 ∩ L2 :
Intersection of L1 and L2 can be explained by language that a string over {0, 1} accept such that it ends with 01 and has even number of 1’s.

L = L1 ∩ L2

= {1001, 0101, 01001, 10001, ....}

Intersection Process of Two DFAs | Theory of Computation - Computer Science Engineering (CSE)

Thus as we see that L1 and L2 have been combined through intersection process and this final DFA accept all the language that has even number of 1’s and is ending with 01.

The document Intersection Process of Two DFAs | Theory of Computation - Computer Science Engineering (CSE) is a part of the Computer Science Engineering (CSE) Course Theory of Computation.
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