def kalmanson_fan(n):
fn = "kalmanson_fan_%i" % n
try:
return db(fn)
except IOError:
f = Fan(Set(kalmanson_cones(n)))
f.db(fn)
return f
def __call__(self, *args):
fn = ("%s" + ("_%i" * len(args))) % ((self.f.__name__, ) + args)
try:
return db(fn)
except IOError:
res = self.f(*args)
db_save(res, fn)
return res
def kalmanson_cones(n):
desc = "kalmanson_cones_%i" % n
try:
return db(desc)
except IOError:
R = rays(n)
ray_sets = Set([Set([permute_matrix(g,M) for M in R]) for g in SymmetricGroup(n)])
p_iter = sage.parallel.use_fork.p_iter_fork(sage.parallel.ncpus.ncpus() * 2,30)
P = parallel(p_iter=p_iter)
cones = [ret for ((poly,kwd),ret) in P(make_cone)(ray_sets.list())]
db_save(Set(cones), desc)
return cones