## Speaker:

Benny George K.
School of Technology and Computer Science
Tata Institute of Fundamental Research
Homi Bhabha Road

## Time:

Friday, 19 June 2009 (All day)

## Venue:

- A-212 (STCS Seminar Room)

XZ=ZY is called the conjugacy equation. Given languages X and Y we are interested in knowing if there exists a non empty language Z which makes this equation true. This problem is undecidable in the general setting. We first look at X being a two element set and Y a three element set and obtain some characterizations for X and Y to be conjugates. We then extend some of those results to the case when Y is a finite set.