The Null Set - 2013 was released on:
USA: 12 December 2013 (video premiere)
Breaking the Set - 2013 was released on: USA: 2 August 2013
The cast of The Null Set - 2013 includes: Rob Ceriello as Tom Maria Prudente as Samantha Andrew Sensenig as Doctor Mendez
Quiet on the Set - 2013 was released on: USA: 24 May 2013 (Director's Guild of America)
A null set is a set with nothing in it. A set containing a null set is still containing a "null set". Therefore it is right to say that the null set is not the same as a set containing only the null set.
The null set. Every set is a subset of itself and so the null set is a subset of the null set.
Sheba Catfood On-Set with Eva - 2013 was released on: USA: 27 February 2013
Ready Set Write a Novel - 2013 was released on: USA: 1 October 2013
On the Set Inside Hollywood Movies - 2013 was released on: USA: 19 January 2013
On the Set with Judy Kerr - 2013 was released on: USA: 19 April 2013 (Santa Monica, California)
Veep Season 2 - Invitation to the Set - 2013 was released on: USA: March 2013
There is only one null set. It is 'the' null set. It is a set which does not contain any numbers.
The Set Effect - 1999 was released on: USA: October 2013