38 SUR LES GKOUPKS d'oUDRE FIM. 
pondant sonl * 
n= (i, 2, 3, 4) (5, 6, ~, 8) (9, lo, ii, 12) (i3, j4, i5, 16) 
X (17, 18, 19, 20) (21, 22, 23, 24) (25, 26, 27, 28) (29, 3o, 3i . 32). 
h=z (i, 5, 9, i3) (2, i4, 10, 6) (3, 7, II, i5) (4, 16. 12. 8) 
X (17, ai, 25, 29) (18. 3o, 26, 22) (19, 23, 27, 3i) (20, 32. 28, 24). 
c ~ (i, 17, II, 27) (2, 28, 12, 18) (3, 19. 9, 25) (4, 26, 10, 20) 
X (5, 3i, i5, 21) (6, 24, 16, 3o) (7. 29, i3, 23) (8. 22, i4. 32). 
Voici les faisceaux 
F, r= [ I , a, 2?, a27. 0. r/f), SrO, a?j(l]. 
[1, c, 2rf). c&O, Br, c&, 0, cO, ab, abc, ab^i), abc^d. 
I abX!, abc:^, abO, abc^ 
V^— [1, at\ 2r. rtC'Sr, 0. «cO, SrO, ac&O], 
F,5= [i, bc, 0, 6cO, S, 6c27, S-0, ^^c^O]. 
36. q. Le groupe 
(rt-=c^=S', 6"-=0, Sr-^O^^i, ab= baii, ac — ca'3, bc — cb) 
a 
28 opérations d'ordre 4? 
3 » » 2. 
Les isomorphismes qui engendrent le gi'oupc associé sonl 
a = (6, b(i) {ab, abD) ( f, c&) 
X ( bc; bc?j(}) {abc, abc^O) {ac, ac'b) ( Z»37, ^(S'O) 
x{ab^, a6&0)(cO, cS'0)(fl'cO, ac?!<)) {bc'b, bc^) {abc'^, abcd), 
b— {a. ai)) {ab, abO) {ac, acO) {abc, abcO) 
X {a?j, a^O) {ab?j, ab'bi)) {ac'i, ac?j<)) {abc'^, abc^i)). 
f= {a. a?j) {ab, ab'b) {ac, ac?j) {abc, abc?j) 
X («0, «270) {abU. ab'bf}) {acD. ac?j()) {abc?!, abc?jfl). 
Les substitutions génératrices du groupe régulier corrcs- 
