Complexity Theory and Algorithmics Group

About the logo

The logo in Postscript (only 798 bytes). For the aesthetes amongst you, the text of the Postscript file is reproduced below.

The logo in PDF (still fairly parsimonious at 2170 bytes)

The design of the logo

The design is with reference to some of the research topics that used to be the focus of the group; they are no longer such a focus, but the logo remains! The letters C, T, A, G are the standard notations for the four bases of DNA (refers to DNA computing). The group name is superimposed within a 2-edge colouring of the 4-dimensional hypercube, H4. Each set of monochromatic edges traces a Hamiltonian Cycle in this network. (refers to networks of parallel machines, and combinatorics generally)

Back to the CTAG home page

The CTAG logo in Postscript

%!
100 100 scale
/j {45 mul /ang2 exch def 45 mul /ang1 exch def 1.414 ang1 ang2 arc stroke} def

/arcs{
0.1 setlinewidth 0.5 0.8 1 setrgbcolor
2 3 1 5 j 3 3 1 3 j 1 3 -1 1 j 2 4 5 7 j 4 3 3 5 j 2 3 3 5 j
4 3 moveto 4 4 lineto stroke 1 3 moveto 2 3 lineto stroke
1 0 0 setrgbcolor
1 3 moveto 1 4 lineto 2 4 lineto 2 3 lineto stroke
4 3 moveto 3 3 lineto 3 4 lineto 4 4 lineto stroke
2 2 3 5 j 3 4 5 7 j
} def
arcs gsave 180 rotate -5 -5 translate arcs grestore

0.03 setlinewidth
1 1 4 { /x exch def 1 1 4 { /y exch def
0 0 1 setrgbcolor x y 0.13 0 360 arc fill 0 setgray x y 0.13 0 360 arc stroke
 } for } for

/Times-Bold-Italic findfont 0.8 scalefont setfont
0.25 0.25 translate
1 3 moveto (C) show 3 3 moveto (T) show 1 1 moveto (A) show 3 1 moveto (G) show 
showpage

Last modified by Paul W Goldberg: 20th December 2006