SymPy | Permutation.unrank_trotterjohnson() in Python
Permutation.unrank_trotterjohnson() : unrank_trotterjohnson() is a sympy Python library function that returns the Trotter Johnson permutation unranking
Syntax : sympy.combinatorics.permutations.Permutation.unrank_trotterjohnson()
Return : Trotter Johnson permutation unranking
Code #1 : unrank_trotterjohnson() Example
from sympy.combinatorics.partitions import Partition
from sympy.combinatorics.permutations import Permutation
a = Permutation([[ 2 , 0 ], [ 3 , 1 ]])
b = Permutation([ 1 , 3 , 5 , 4 , 2 , 0 ])
size = 3
rank = 5
print ( "Permutation a - unrank_trotterjohnson form : " , a.unrank_trotterjohnson(size, rank))
print ( "Permutation b - unrank_trotterjohnson form : " , b.unrank_trotterjohnson( 5 , rank))
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Output :
Permutation a – unrank_trotterjohnson form : (2)(0 1)
Permutation b – unrank_trotterjohnson form : (0 4 2 1)
Code #2 : unrank_trotterjohnson() Example
from sympy.combinatorics.partitions import Partition
from sympy.combinatorics.permutations import Permutation
a = Permutation([[ 2 , 4 , 0 ],
[ 3 , 1 , 2 ],
[ 1 , 5 , 6 ]])
print ( "Permutation a - unrank_trotterjohnson form : " , a.unrank_trotterjohnson( 4 , 8 ))
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Output :
Permutation a – unrank_trotterjohnson form : (3)(0 2 1)
Last Updated :
27 Aug, 2019
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