On the Spectra of Certain Classes of Room Frames

10.37236/1187 ◽  
1994 ◽  
Vol 1 (1) ◽  
Author(s):  
Jeffrey H. Dinitz ◽  
Douglas R. Stinson ◽  
L. Zhu
Keyword(s):  

In this paper we study the spectra of certain classes of Room frames. The three spectra are incomplete Room squares, uniform Room frames and Room frames of type $2^ut^1$. These problems have been studied in numerous papers over the years; in this paper, we complete the three spectra except for one possible exception in each case.

10.37236/346 ◽  
2010 ◽  
Vol 17 (1) ◽  
Author(s):  
Jeffrey H. Dinitz ◽  
Gregory S. Warrington
Keyword(s):  

In this paper we study the spectra of certain classes of Room frames. The three spectra which we study are incomplete Room squares, uniform Room frames and Room frames of type $2^ut^1$. These problems have been studied in numerous papers over the years; in this paper, we complete the three spectra. In addition we find a Howell cube of type $H_3(6,10)$. This corrects a previous claim of nonexistence of this design.


2001 ◽  
Vol 120 (5) ◽  
pp. A314-A314
Author(s):  
K HADERSLEV ◽  
P JEPPESEN ◽  
B HARTMANN ◽  
J THULESEN ◽  
J GRAFF ◽  
...  

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