I haven't yet wrapped my head around iterators, and I needed all the partitions, so I stripped all that functionality out. @time a = partitions(50); 0.358846 seconds (204.25 k allocations: 41.444 MiB, ...

> 原文:[https://www . geesforgeks . org/python-sympy-combinarics-prev _ lex-method/](https://www.geeksforgeeks.org/python-sympy-combinatorics-prev_lex-method ...

The study of alternating sign matrices (ASMs) occupies a central position in enumerative combinatorics, linking intricate algebraic methods with models from statistical physics. ASMs are square ...

ABSTRACT: In this paper we present combinatorial interpretations and polynomials generalizations for sequences including the Fibonacci numbers, the Pell numbers and the Jacobsthal numbers in terms of ...

ABSTRACT: Recently in [1] Goyal and Agarwal interpreted a generalized basic series as a generating function for a colour partition function and a weighted lattice path function. This led to an ...

Plane partitions were first studied by Percy Alexander MacMahon at the beginning of the twentieth century and since then these objects have given rise to a rich and diverse range of results in ...