Wall for Arjun

@Arjun sir , see http://gateoverflow.in/2258/gate1997_6-2

@arjun sir , see http://gateoverflow.in/2252/gate1997_5-1

@arjun sir , regarding qest- 2.5 GATE-1997 ,
I needed your hint about question since  somewhere answer is given A) const time .... plz ???

@Arjun sir , see the quest-23(b) (conventional) GATE-1996

@Arjun sir , see the quest-18 (conventional) GATE-1996
http://gateoverflow.in/2770/gate1996_18

source , page#- 40 .@http://www.cse.chalmers.se/~coquand/AUTOMATA/l10.pdf

@Arjun sir ,
is it correct .... regarding "removing null production from CFG"

Eliminating - and unit productions
Example: If we start from the grammar
S → aSb | SS | 
we get first the new productions
S → ab | S | S
and if we eliminate the - and unit productions we get
S → aSb | SS | ab

can we remove null from CFG if that grammar generates null ???

@Arjun sir , need explaination ... GATE 1996  quet-6 (conventional quest) and quet-8 (conventional quest)

okay :) but not anytime in near future :)

ha ha ha!! may be you should open an institute sir ;) and call me while you do for teaching :P