CoCalc Public Fileswww / cgi-bin / mfd / cremona.py
Author: William A. Stein
Compute Environment: Ubuntu 18.04 (Deprecated)
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########################################################################
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# cremona.py -- import all of Cremona's latest data into the
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# Modular Forms Explorer
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#
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# William Stein, January 10, 2001
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#
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########################################################################
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import constants, mfd, misc, string
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CREMONA = "/home/was/www/cremona/"
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CURVES = ["curves.1-8000", "curves.8001-12000"]
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DEGPHI = ["degphi.1-8000"]
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GENS = ["gens.1-8000", "gens.8001-12000"]
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APLIST = ["aplist.1-12000"]
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ALLBIGSHA = ["allbigsha.1-8000", "allbigsha.8001-12000"]
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ALLBSD = ["allbsd.1-8000", "allbsd.8001-12000"]
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ALLCURVES = ["allcurves.1-8000", "allcurves.8001-12000"]
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ALLGENS = ["allgens.1-8000", "allgens.8001-12000"]
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COUNT = ["count.1-12000"]
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data = ""
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for fname in files:
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return string.split(data,"\n")
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def add_curve(N, iso, a_invariants, rank, torsion, degphi):
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print "adding curves ", N, iso
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stein = misc.cremona_to_stein(N, iso)
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print "using iso = ",stein[1]
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f = mfd.ModSym(N,2,stein[1])
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f.set_dimension(1)
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f.set_hecke_field('x-1')
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a_invariants = '{' + a_invariants[1:-1] + '}'
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f.set_a_invariants(a_invariants)
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f.set_mwrank(rank)
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f.set_torsion_size(torsion)
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f.set_modular_degree(degphi)
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def curves(first, last):
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for E in data:
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fields = string.split(E)
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if len(fields)==0:
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return
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N = int(fields[0])
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if N >= first and N <= last:
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add_curve(N, fields[1], fields[3], fields[4], fields[5], fields[6])
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if N > last:
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return
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PRIMES = [2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97]
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def aplist_helper(fields):
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t = "{"
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atkin = "{"
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N = int(fields[0])
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for i in range(0,25):
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ap = fields[i+2]
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wp = ""
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if ap == "+" or ap == "-":
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wp = ap
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if N%(PRIMES[i]*PRIMES[i]) == 0:
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ap = "0"
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elif ap == "+":
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ap = "-1"
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elif ap == "-":
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ap = "+1"
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if atkin == "{":
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atkin = atkin + str(int(wp+"1"))
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else:
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atkin = atkin + "," + str(int(wp+"1"))
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if t == "{":
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t = t + ap
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else:
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t = t + "," + ap
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for i in range(27,len(fields)):
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wp = fields[i][:1]
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if atkin == "{":
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atkin = atkin + str(int(wp+"1"))
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else:
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atkin = atkin + "," + str(int(wp+"1"))
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t = t + "}"
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atkin = atkin + "}"
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return [t, atkin]
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def aplist(first, last):
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for E in data:
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fields = string.split(E)
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if len(fields) == 0:
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return
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N = int(fields[0])
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if N > last:
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return
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if N >= first:
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print N
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stein = misc.cremona_to_stein(N,fields[1])
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f = mfd.ModSym(N,2,stein[1])
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if f.traces() == constants.not_computed or f.atkin_lehner() == constants.not_computed:
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x = aplist_helper(fields)
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print "x = ",x
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t = x[0]
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atkin = x[1]
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f.set_traces(t)
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f.set_atkin_lehner(atkin)
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else:
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print "skipping ",N
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# degphi is NOT TESTED -- don't run, since it's already done by the CURVES file.
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def degphi(first, last):
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for E in data:
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fields = string.split(E)
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if len(fields) == 0:
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return
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N = int(fields[0])
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if N > last:
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return
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if N >= first:
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print N
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stein = misc.cremona_to_stein(N,fields[1][:-1])
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f = mfd.ModSym(N,2, stein[1])
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if f.modular_degree() == constants.not_computed:
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degree = fields[2] # don't change to string, since could be bigger than PYTHON string
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primes = fields[3]
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print "setting deg =", degree, " and primes =", primes
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f.set_modular_degree(degree)
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f.set_modular_degree_primes(primes)
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else:
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print "skipping level",N
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def gens(first, last):
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for E in data:
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fields = string.split(E)
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if len(fields) == 0:
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return
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N = int(fields[0])
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if N > last:
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return
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if N >= first:
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print N
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stein = misc.cremona_to_stein(N,int(fields[1]))
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f = mfd.ModSym(N,2,stein[1])
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if f.mw_generators() == constants.not_computed:
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gens = "{"
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for i in range(5,len(fields)):
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x = fields[i]
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x = string.replace(x, ":",",")
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x = string.replace(x, "[", "{")
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x = string.replace(x, "]", "}")
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if gens != "{":
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gens = gens + ","
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gens = gens + x
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gens = gens + "}"
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f.set_mw_generators(gens)
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else:
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print "skipping level",N
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def allbsd_helper(f, fields):
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om = fields[7] # real period
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L = fields[8] # L^(r)(E,1) leading value
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R = fields[9] # regulator
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S = fields[10]
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if string.find(S,".") != -1:
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S = str(int(round(float(S))))
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f.set_real_volume(om)
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f.set_regulator(R)
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f.set_sha_an(S)
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def allbsd(first, last):
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for E in data:
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fields = string.split(E)
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if len(fields) == 0:
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return
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N = int(fields[0])
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if N > last:
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return
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if fields[2] == "1" and N >= first: # take only the optimal ones in the appropriate range
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print N
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stein = misc.cremona_to_stein(N,fields[1])
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f = mfd.ModSym(N,2,stein[1])
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allbsd_helper(f, fields)
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