Cas a:=0.$

delta:=
mat((0,0,0,0,0,0),(0,0,0,0,0,0),(0,1,0,0,0,0),(0,0,0,0,0,0),(0,0,0,1,0,0),(0,0,0
,0,0,0))$

shortformdelta:={0,
ss,
0,
1,
ss,
0,
ss,
0,
0,
ss,
0,
0}$

phase 1 de la resolution des equations$

on resout l'equation {{0,1},3} qui est  maintenant AA:=d(2,1)$

Unknown: d(2,1)
Unknown: d(2,1)
bonne inconnue W:=d(2,1)$

sa valeur doit etre WW:=0$

on resout l'equation {{0,1},4} qui est  maintenant AA:= - d(2,0)$

Unknown: d(2,0)
Unknown: d(2,0)
bonne inconnue W:=d(2,0)$

sa valeur doit etre WW:=0$

on resout l'equation {{0,1},5} qui est  maintenant AA:=d(4,1) - d(3,0)$

Unknowns: {d(4,1),d(3,0)}
Unknowns: {d(4,1),d(3,0)}
bonne inconnue W:=d(4,1)$

sa valeur doit etre WW:=d(3,0)$

on resout l'equation {{0,1},6} qui est  maintenant AA:= - d(4,0)$

Unknown: d(4,0)
Unknown: d(4,0)
bonne inconnue W:=d(4,0)$

sa valeur doit etre WW:=0$

on resout l'equation {{0,2},0} qui est  maintenant AA:= - d(0,3)$

Unknown: d(0,3)
Unknown: d(0,3)
bonne inconnue W:=d(0,3)$

sa valeur doit etre WW:=0$

on resout l'equation {{0,2},1} qui est  maintenant AA:= - d(1,3)$

Unknown: d(1,3)
Unknown: d(1,3)
bonne inconnue W:=d(1,3)$

sa valeur doit etre WW:=0$

on resout l'equation {{0,2},2} qui est  maintenant AA:= - d(2,3)$

Unknown: d(2,3)
Unknown: d(2,3)
bonne inconnue W:=d(2,3)$

sa valeur doit etre WW:=0$

on resout l'equation {{0,2},3} qui est  maintenant AA:= - d(3,3) + d(2,2) + d(0,
0)$

Unknowns: {d(3,3),d(2,2),d(0,0)}
Unknowns: {d(3,3),d(2,2),d(0,0)}
bonne inconnue W:=d(3,3)$

sa valeur doit etre WW:=d(2,2) + d(0,0)$

on resout l'equation {{0,2},4} qui est  maintenant AA:= - d(4,3) + d(1,0)$

Unknowns: {d(4,3),d(1,0)}
Unknowns: {d(4,3),d(1,0)}
bonne inconnue W:=d(4,3)$

sa valeur doit etre WW:=d(1,0)$

on resout l'equation {{0,2},5} qui est  maintenant AA:= - d(5,3) + d(4,2)$

Unknowns: {d(5,3),d(4,2)}
Unknowns: {d(5,3),d(4,2)}
bonne inconnue W:=d(5,3)$

sa valeur doit etre WW:=d(4,2)$

on resout l'equation {{0,2},6} qui est  maintenant AA:= - d(6,3) + d(3,0)$

Unknowns: {d(6,3),d(3,0)}
Unknowns: {d(6,3),d(3,0)}
bonne inconnue W:=d(6,3)$

sa valeur doit etre WW:=d(3,0)$

on resout l'equation {{0,3},5} qui est  maintenant AA:=2*d(1,0)$

Unknown: d(1,0)
Unknown: d(1,0)
bonne inconnue W:=d(1,0)$

sa valeur doit etre WW:=0$

on resout l'equation {{0,4},0} qui est  maintenant AA:= - d(0,5)$

Unknown: d(0,5)
Unknown: d(0,5)
bonne inconnue W:=d(0,5)$

sa valeur doit etre WW:=0$

on resout l'equation {{0,4},1} qui est  maintenant AA:= - d(1,5)$

Unknown: d(1,5)
Unknown: d(1,5)
bonne inconnue W:=d(1,5)$

sa valeur doit etre WW:=0$

on resout l'equation {{0,4},2} qui est  maintenant AA:= - d(2,5)$

Unknown: d(2,5)
Unknown: d(2,5)
bonne inconnue W:=d(2,5)$

sa valeur doit etre WW:=0$

on resout l'equation {{0,4},3} qui est  maintenant AA:= - d(3,5) + d(2,4)$

Unknowns: {d(3,5),d(2,4)}
Unknowns: {d(3,5),d(2,4)}
bonne inconnue W:=d(3,5)$

sa valeur doit etre WW:=d(2,4)$

on resout l'equation {{0,4},4} qui est  maintenant AA:= - d(4,5)$

Unknown: d(4,5)
Unknown: d(4,5)
bonne inconnue W:=d(4,5)$

sa valeur doit etre WW:=0$

on resout l'equation {{0,4},5} qui est  maintenant AA:= - d(5,5) + d(4,4) + d(0,
0)$

Unknowns: {d(5,5),d(4,4),d(0,0)}
Unknowns: {d(5,5),d(4,4),d(0,0)}
bonne inconnue W:=d(5,5)$

sa valeur doit etre WW:=d(4,4) + d(0,0)$

on resout l'equation {{0,4},6} qui est  maintenant AA:= - d(6,5)$

Unknown: d(6,5)
Unknown: d(6,5)
bonne inconnue W:=d(6,5)$

sa valeur doit etre WW:=0$

on resout l'equation {{0,6},3} qui est  maintenant AA:=d(2,6)$

Unknown: d(2,6)
Unknown: d(2,6)
bonne inconnue W:=d(2,6)$

sa valeur doit etre WW:=0$

on resout l'equation {{0,6},5} qui est  maintenant AA:=d(4,6)$

Unknown: d(4,6)
Unknown: d(4,6)
bonne inconnue W:=d(4,6)$

sa valeur doit etre WW:=0$

on resout l'equation {{1,2},0} qui est  maintenant AA:= - d(0,4)$

Unknown: d(0,4)
Unknown: d(0,4)
bonne inconnue W:=d(0,4)$

sa valeur doit etre WW:=0$

on resout l'equation {{1,2},1} qui est  maintenant AA:= - d(1,4)$

Unknown: d(1,4)
Unknown: d(1,4)
bonne inconnue W:=d(1,4)$

sa valeur doit etre WW:=0$

on resout l'equation {{1,2},2} qui est  maintenant AA:= - d(2,4)$

Unknown: d(2,4)
Unknown: d(2,4)
bonne inconnue W:=d(2,4)$

sa valeur doit etre WW:=0$

on resout l'equation {{1,2},3} qui est  maintenant AA:= - d(3,4) + d(0,1)$

Unknowns: {d(3,4),d(0,1)}
Unknowns: {d(3,4),d(0,1)}
bonne inconnue W:=d(3,4)$

sa valeur doit etre WW:=d(0,1)$

on resout l'equation {{1,2},4} qui est  maintenant AA:= - d(4,4) + d(2,2) + d(1,
1)$

Unknowns: {d(4,4),d(2,2),d(1,1)}
Unknowns: {d(4,4),d(2,2),d(1,1)}
bonne inconnue W:=d(4,4)$

sa valeur doit etre WW:=d(2,2) + d(1,1)$

on resout l'equation {{1,2},5} qui est  maintenant AA:= - d(5,4) + d(3,2)$

Unknowns: {d(5,4),d(3,2)}
Unknowns: {d(5,4),d(3,2)}
bonne inconnue W:=d(5,4)$

sa valeur doit etre WW:=d(3,2)$

on resout l'equation {{1,2},6} qui est  maintenant AA:= - d(6,4) + d(4,2) + d(3,
1)$

Unknowns: {d(6,4),d(4,2),d(3,1)}
Unknowns: {d(6,4),d(4,2),d(3,1)}
bonne inconnue W:=d(6,4)$

sa valeur doit etre WW:=d(4,2) + d(3,1)$

on resout l'equation {{1,4},0} qui est  maintenant AA:= - d(0,6)$

Unknown: d(0,6)
Unknown: d(0,6)
bonne inconnue W:=d(0,6)$

sa valeur doit etre WW:=0$

on resout l'equation {{1,4},1} qui est  maintenant AA:= - d(1,6)$

Unknown: d(1,6)
Unknown: d(1,6)
bonne inconnue W:=d(1,6)$

sa valeur doit etre WW:=0$

on resout l'equation {{1,4},3} qui est  maintenant AA:= - d(3,6)$

Unknown: d(3,6)
Unknown: d(3,6)
bonne inconnue W:=d(3,6)$

sa valeur doit etre WW:=0$

on resout l'equation {{1,4},5} qui est  maintenant AA:= - d(5,6) + 2*d(0,1)$

Unknowns: {d(5,6),d(0,1)}
Unknowns: {d(5,6),d(0,1)}
bonne inconnue W:=d(5,6)$

sa valeur doit etre WW:=2*d(0,1)$

on resout l'equation {{1,4},6} qui est  maintenant AA:= - d(6,6) + d(2,2) + 2*d(
1,1)$

Unknowns: {d(6,6),d(2,2),d(1,1)}
Unknowns: {d(6,6),d(2,2),d(1,1)}
bonne inconnue W:=d(6,6)$

sa valeur doit etre WW:=d(2,2) + 2*d(1,1)$

on resout l'equation {{2,3},5} qui est  maintenant AA:=d(1,2) + 2*d(0,1)$

Unknowns: {d(1,2),d(0,1)}
Unknowns: {d(1,2),d(0,1)}
bonne inconnue W:=d(0,1)$

sa valeur doit etre WW:=( - d(1,2))/2$

on resout l'equation {{2,3},6} qui est  maintenant AA:= - d(2,2) + 2*d(1,1) - d(
0,0)$

Unknowns: {d(2,2),d(1,1),d(0,0)}
Unknowns: {d(2,2),d(1,1),d(0,0)}
bonne inconnue W:=d(2,2)$

sa valeur doit etre WW:=2*d(1,1) - d(0,0)$

on resout l'equation {{2,4},5} qui est  maintenant AA:=d(0,2)$

Unknown: d(0,2)
Unknown: d(0,2)
bonne inconnue W:=d(0,2)$

sa valeur doit etre WW:=0$

on resout l'equation {{2,4},6} qui est  maintenant AA:=(3*d(1,2))/2$

Unknown: d(1,2)
Unknown: d(1,2)
bonne inconnue W:=d(1,2)$

sa valeur doit etre WW:=0$

Derivation equations to cancel (Reduce output) : \\{{{{0,1},3},0},
{{{0,1},4},0},
{{{0,1},5},0},
{{{0,1},6},0},
{{{0,2},0},0},
{{{0,2},1},0},
{{{0,2},2},0},
{{{0,2},3},0},
{{{0,2},4},0},
{{{0,2},5},0},
{{{0,2},6},0},
{{{0,3},3},0},
{{{0,3},5},0},
{{{0,3},6},0},
{{{0,4},0},0},
{{{0,4},1},0},
{{{0,4},2},0},
{{{0,4},3},0},
{{{0,4},4},0},
{{{0,4},5},0},
{{{0,4},6},0},
{{{0,5},3},0},
{{{0,5},5},0},
{{{0,6},3},0},
{{{0,6},5},0},
{{{1,2},0},0},
{{{1,2},1},0},
{{{1,2},2},0},
{{{1,2},3},0},
{{{1,2},4},0},
{{{1,2},5},0},
{{{1,2},6},0},
{{{1,3},0},0},
{{{1,3},1},0},
{{{1,3},2},0},
{{{1,3},3},0},
{{{1,3},4},0},
{{{1,3},5},0},
{{{1,3},6},0},
{{{1,4},0},0},
{{{1,4},1},0},
{{{1,4},2},0},
{{{1,4},3},0},
{{{1,4},4},0},
{{{1,4},5},0},
{{{1,4},6},0},
{{{1,5},4},0},
{{{1,5},5},0},
{{{1,5},6},0},
{{{1,6},4},0},
{{{1,6},5},0},
{{{1,6},6},0},
{{{2,3},0},0},
{{{2,3},1},0},
{{{2,3},2},0},
{{{2,3},3},0},
{{{2,3},4},0},
{{{2,3},5},0},
{{{2,3},6},0},
{{{2,4},3},0},
{{{2,4},4},0},
{{{2,4},5},0},
{{{2,4},6},0},
{{{2,5},3},0},
{{{2,5},4},0},
{{{2,5},6},0},
{{{2,6},3},0},
{{{2,6},4},0},
{{{2,6},6},0},
{{{3,4},5},0},
{{{3,4},6},0},
{{{3,5},5},0},
{{{3,5},6},0},
{{{3,6},5},0},
{{{3,6},6},0},
{{{4,5},5},0},
{{{4,5},6},0},
{{{4,6},5},0},
{{{4,6},6},0}}$

il n'y a pas de phase 2$

collect_eq:={{{{0,1},3},0},
{{{0,1},4},0},
{{{0,1},5},0},
{{{0,1},6},0},
{{{0,2},0},0},
{{{0,2},1},0},
{{{0,2},2},0},
{{{0,2},3},0},
{{{0,2},4},0},
{{{0,2},5},0},
{{{0,2},6},0},
{{{0,3},3},0},
{{{0,3},5},0},
{{{0,3},6},0},
{{{0,4},0},0},
{{{0,4},1},0},
{{{0,4},2},0},
{{{0,4},3},0},
{{{0,4},4},0},
{{{0,4},5},0},
{{{0,4},6},0},
{{{0,5},3},0},
{{{0,5},5},0},
{{{0,6},3},0},
{{{0,6},5},0},
{{{1,2},0},0},
{{{1,2},1},0},
{{{1,2},2},0},
{{{1,2},3},0},
{{{1,2},4},0},
{{{1,2},5},0},
{{{1,2},6},0},
{{{1,3},0},0},
{{{1,3},1},0},
{{{1,3},2},0},
{{{1,3},3},0},
{{{1,3},4},0},
{{{1,3},5},0},
{{{1,3},6},0},
{{{1,4},0},0},
{{{1,4},1},0},
{{{1,4},2},0},
{{{1,4},3},0},
{{{1,4},4},0},
{{{1,4},5},0},
{{{1,4},6},0},
{{{1,5},4},0},
{{{1,5},5},0},
{{{1,5},6},0},
{{{1,6},4},0},
{{{1,6},5},0},
{{{1,6},6},0},
{{{2,3},0},0},
{{{2,3},1},0},
{{{2,3},2},0},
{{{2,3},3},0},
{{{2,3},4},0},
{{{2,3},5},0},
{{{2,3},6},0},
{{{2,4},3},0},
{{{2,4},4},0},
{{{2,4},5},0},
{{{2,4},6},0},
{{{2,5},3},0},
{{{2,5},4},0},
{{{2,5},6},0},
{{{2,6},3},0},
{{{2,6},4},0},
{{{2,6},6},0},
{{{3,4},5},0},
{{{3,4},6},0},
{{{3,5},5},0},
{{{3,5},6},0},
{{{3,6},5},0},
{{{3,6},6},0},
{{{4,5},5},0},
{{{4,5},6},0},
{{{4,6},5},0},
{{{4,6},6},0}}$

derivation generique de gtildedelta:$

MATD:=
mat((d(0,0),0,0,0,0,0,0),(0,d(1,1),0,0,0,0,0),(0,0,2*d(1,1) - d(0,0),0,0,0,0),(d
(3,0),d(3,1),d(3,2),2*d(1,1),0,0,0),(0,d(3,0),d(4,2),0,3*d(1,1) - d(0,0),0,0),(d
(5,0),d(5,1),d(5,2),d(4,2),d(3,2),3*d(1,1),0),(d(6,0),d(6,1),d(6,2),d(3,0),d(4,2
) + d(3,1),0,4*d(1,1) - d(0,0)))$

pour delta:=

[0  0  0  0  0  0]
[                ]
[0  0  0  0  0  0]
[                ]
[0  1  0  0  0  0]
[                ]
[0  0  0  0  0  0]
[                ]
[0  0  0  1  0  0]
[                ]
[0  0  0  0  0  0]


pour shortformdelta:={0,

   ss,

   0,

   1,

   ss,

   0,

   ss,

   0,

   0,

   ss,

   0,

   0}

Unknowns: {d(6,2),
d(6,1),
d(6,0),
d(5,2),
d(5,1),
d(5,0),
d(4,2),
d(3,2),
d(3,1),
d(3,0),
d(1,1),
d(0,0)}
Unknowns: {d(6,2),
d(6,1),
d(6,0),
d(5,2),
d(5,1),
d(5,0),
d(4,2),
d(3,2),
d(3,1),
d(3,0),
d(1,1),
d(0,0)}
Unknowns: {d(6,2),
d(6,1),
d(6,0),
d(5,2),
d(5,1),
d(5,0),
d(4,2),
d(3,2),
d(3,1),
d(3,0),
d(1,1),
d(0,0)}
Unknowns: {d(6,2),
d(6,1),
d(6,0),
d(5,2),
d(5,1),
d(5,0),
d(4,2),
d(3,2),
d(3,1),
d(3,0),
d(1,1),
d(0,0)}
dim Der(gtildedelta):=12$

Unknowns: {d(6,2),
d(6,1),
d(6,0),
d(5,2),
d(5,1),
d(5,0),
d(4,2),
d(3,2),
d(3,1),
d(3,0),
d(1,1),
d(0,0)}
Unknowns: {d(6,2),
d(6,1),
d(6,0),
d(5,2),
d(5,1),
d(5,0),
d(4,2),
d(3,2),
d(3,1),
d(3,0),
d(1,1),
d(0,0)}
listeparametresMATD{d(6,2),
d(6,1),
d(6,0),
d(5,2),
d(5,1),
d(5,0),
d(4,2),
d(3,2),
d(3,1),
d(3,0),
d(1,1),
d(0,0)}$

un element t1 d'un tore $

t1:=D(0,0)$

t1:=

[1  0  0   0  0   0  0 ]
[                      ]
[0  0  0   0  0   0  0 ]
[                      ]
[0  0  -1  0  0   0  0 ]
[                      ]
[0  0  0   0  0   0  0 ]
[                      ]
[0  0  0   0  -1  0  0 ]
[                      ]
[0  0  0   0  0   0  0 ]
[                      ]
[0  0  0   0  0   0  -1]


MATD:=

mat((d(0,0),0,0,0,0,0,0),

    (0,d(1,1),0,0,0,0,0),

    (0,0,2*d(1,1) - d(0,0),0,0,0,0),

    (d(3,0),d(3,1),d(3,2),2*d(1,1),0,0,0),

    (0,d(3,0),d(4,2),0,3*d(1,1) - d(0,0),0,0),

    (d(5,0),d(5,1),d(5,2),d(4,2),d(3,2),3*d(1,1),0),

    (d(6,0),d(6,1),d(6,2),d(3,0),d(4,2) + d(3,1),0,4*d(1,1) - d(0,0)))



on peut prendre comme element semi simple du commutant de t1 dans der(gtildede\
lta):

Unknowns: {d(6,2),d(5,1),d(4,2),d(3,1),d(1,1),d(0,0)}

Unknowns: {d(6,2),d(5,1),d(4,2),d(3,1),d(1,1),d(0,0)}

t2:=D(1,1):=

[0  0  0  0  0  0  0]
[                   ]
[0  1  0  0  0  0  0]
[                   ]
[0  0  2  0  0  0  0]
[                   ]
[0  0  0  2  0  0  0]
[                   ]
[0  0  0  0  3  0  0]
[                   ]
[0  0  0  0  0  3  0]
[                   ]
[0  0  0  0  0  0  4]


 t1,t2 est un tore maximal.


matrice de passage de la base X(0)=delta, X(1),..., X(6) a une base  diagonali\
sant le tore maximal: on peut prendre

P:=

[1  0  0  0  0  0  0]
[                   ]
[0  1  0  0  0  0  0]
[                   ]
[0  0  1  0  0  0  0]
[                   ]
[0  0  0  1  0  0  0]
[                   ]
[0  0  0  0  1  0  0]
[                   ]
[0  0  0  0  0  1  0]
[                   ]
[0  0  0  0  0  0  1]


P**(-1)*t1*P:=

[1  0  0   0  0   0  0 ]
[                      ]
[0  0  0   0  0   0  0 ]
[                      ]
[0  0  -1  0  0   0  0 ]
[                      ]
[0  0  0   0  0   0  0 ]
[                      ]
[0  0  0   0  -1  0  0 ]
[                      ]
[0  0  0   0  0   0  0 ]
[                      ]
[0  0  0   0  0   0  -1]


matrice des derivations dans cette base diagonalisante Y(1),...,Y(7):

P**(-1)*MATD*P:=

mat((d(0,0),0,0,0,0,0,0),

    (0,d(1,1),0,0,0,0,0),

    (0,0,2*d(1,1) - d(0,0),0,0,0,0),

    (d(3,0),d(3,1),d(3,2),2*d(1,1),0,0,0),

    (0,d(3,0),d(4,2),0,3*d(1,1) - d(0,0),0,0),

    (d(5,0),d(5,1),d(5,2),d(4,2),d(3,2),3*d(1,1),0),

    (d(6,0),d(6,1),d(6,2),d(3,0),d(4,2) + d(3,1),0,4*d(1,1) - d(0,0)))


PP**(-1)*MATD*PP:=

mat((d(0,0),0,0,0,0,0,0),

    (0,d(1,1),0,0,0,0,0),

    (0,0,2*d(1,1) - d(0,0),0,0,0,0),

    (d(3,0),d(3,1),d(3,2),2*d(1,1),0,0,0),

    (0,d(3,0),d(4,2),0,3*d(1,1) - d(0,0),0,0),

    (d(5,0),d(5,1),d(5,2),d(4,2),d(3,2),3*d(1,1),0),

    (d(6,0),d(6,1),d(6,2),d(3,0),d(4,2) + d(3,1),0,4*d(1,1) - d(0,0)))


avec PP:=P*Q:=

[1  0  0  0  0  0  0]
[                   ]
[0  1  0  0  0  0  0]
[                   ]
[0  0  1  0  0  0  0]
[                   ]
[0  0  0  1  0  0  0]
[                   ]
[0  0  0  0  1  0  0]
[                   ]
[0  0  0  0  0  1  0]
[                   ]
[0  0  0  0  0  0  1]


MATDDIAGONALISE:=

mat((d(0,0),0,0,0,0,0,0),

    (0,d(1,1),0,0,0,0,0),

    (0,0,2*d(1,1) - d(0,0),0,0,0,0),

    (d(3,0),d(3,1),d(3,2),2*d(1,1),0,0,0),

    (0,d(3,0),d(4,2),0,3*d(1,1) - d(0,0),0,0),

    (d(5,0),d(5,1),d(5,2),d(4,2),d(3,2),3*d(1,1),0),

    (d(6,0),d(6,1),d(6,2),d(3,0),d(4,2) + d(3,1),0,4*d(1,1) - d(0,0)))


on voit apparaitre les poids sur la diagonale

ladiag := {{1,d(0,0)},

           {2,d(1,1)},

           {3,2*d(1,1) - d(0,0)},

           {4,2*d(1,1)},

           {5,3*d(1,1) - d(0,0)},

           {6,3*d(1,1)},

           {7,4*d(1,1) - d(0,0)}}

calcul de relations de commutation de la base diaY(j) diagonalisant le tore

listcommutateursdesx := {{{0,1},0},

   {{0,2},x(3)},

   {{0,3},0},

   {{0,4},x(5)},

   {{0,5},0},

   {{0,6},0},

   {{1,2},x(4)},

   {{1,3},x(5)},

   {{1,4},x(6)},

   {{1,5},0},

   {{1,6},0},

   {{2,3}, - x(6)},

   {{2,4},0},

   {{2,5},0},

   {{2,6},0},

   {{3,4},0},

   {{3,5},0},

   {{3,6},0},

   {{4,5},0},

   {{4,6},0},

   {{5,6},0}}

*** diay declared operator 

diaY(1):=x(0)

diaY(2):=x(1)

diaY(3):=x(2)

diaY(4):=x(3)

diaY(5):=x(4)

diaY(6):=x(5)

diaY(7):=x(6)

*** yy declared operator 

*** diadiay declared operator 

liste des commutateurs des diaY(i) := (diadiaY=diaY

{{{1,2},0},

 {{1,3},diadiay(4)},

 {{1,4},0},

 {{1,5},diadiay(6)},

 {{1,6},0},

 {{1,7},0},

 {{2,3},diadiay(5)},

 {{2,4},diadiay(6)},

 {{2,5},diadiay(7)},

 {{2,6},0},

 {{2,7},0},

 {{3,4}, - diadiay(7)},

 {{3,5},0},

 {{3,6},0},

 {{3,7},0},

 {{4,5},0},

 {{4,6},0},

 {{4,7},0},

 {{5,6},0},

 {{5,7},0},

 {{6,7},0}}

on pose :

gamma1:=2*beta2 - beta1 , gamma2:=beta1

(beta1=t1* associe a d(0,0), beta2=t2* associe a t2*

Alors le systeme de poids est exactement le systeme 2.19

on pose :

matrice d'un isom de g_(7,1.35) vers gtildedelta

isom:=

[0   0  1  0  0  0  0]
[                    ]
[0   1  0  0  0  0  0]
[                    ]
[-1  0  0  0  0  0  0]
[                    ]
[0   0  0  0  1  0  0]
[                    ]
[0   0  0  1  0  0  0]
[                    ]
[0   0  0  0  0  0  1]
[                    ]
[0   0  0  0  0  1  0]


det(isom):= 1

*** zz declared operator 

ZZ(1):= - diay(3)

ZZ(2):=diay(2)

ZZ(3):=diay(1)

ZZ(4):=diay(5)

ZZ(5):=diay(4)

ZZ(6):=diay(7)

ZZ(7):=diay(6)

*** zzz declared operator 

liste des commutateurs des ZZ(i) (ZZZ=ZZ:=

{{{1,2},zzz(4)},

 {{1,3},zzz(5)},

 {{1,4},0},

 {{1,5},zzz(6)},

 {{1,6},0},

 {{1,7},0},

 {{2,3},0},

 {{2,4},zzz(6)},

 {{2,5},zzz(7)},

 {{2,6},0},

 {{2,7},0},

 {{3,4},zzz(7)},

 {{3,5},0},

 {{3,6},0},

 {{3,7},0},

 {{4,5},0},

 {{4,6},0},

 {{4,7},0},

 {{5,6},0},

 {{5,7},0},

 {{6,7},0}}

On obtient donc   les relations de commutation de g_{7,2.35} page 647.