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UNIVERSITY OF CALIFORNIA, DAVIS

 

 

BERKELEY 9 DAVIS © IRVINE ® POS ANGELES ® RIVERSIDE © SAN THRGO 2 SAN FRANCISCO SANTA BARBARY © SANTA CRUZ

 

 

 

DEPARTMENT OF MATHEMATICS DAVIS. CALIFORNIA 95616-8633

September 6, 1991

Dr. Joshua Lederberg

The Rockfeller University
1230 York Ave.

New York, NY 10021-6399

 

Dear Joshua:

Sorry it has been so long for my reply to your letters. I
have been ill and sometimes even replying to letters seems to be
more than I can handle.

I was glad to get your second letter pointing out the
Hamiltonian circuit in the "Buckyball". I was going to point out
that the pictures on the xerox copy you sent me about soccerang
show a Hamiltonian circuit in the very same polytope.

You asked about other trivalent polyhedra with minimal face

~ size 5. I have enclosed a photocopy of the cyclically
5-connected 3-polytopes with up to 32 vertices (they all have
HC’s).

Thanks for the article on "Buckyballs", this was new to me
and it sounds very exciting.

I hope all is well with you.
Best regards,

David Barnette