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2021-04-12 06:39:43 +0100 | commented answer | Product of finite rings in sage How to list out the zero-divisors of this ring? Thank you. |

2021-04-12 06:28:02 +0100 | marked best answer | list of all prime powers -1 The primes () method gives the list of all primes. Similarly, I need a list (Say PP) that consists of all $p^k-1$ where $p$ is a prime and $k \ge 1$. How to create this infinite list? Also, I want all possible finite products of elements of PP. Using this I want to understand when two such products are equal. How to do this? Kindly share your thoughts. Thank you. |

2021-04-12 06:27:50 +0100 | commented answer | list of all prime powers -1 @Max Alekseyev Thank you. How to list the elements less than 100 from PP? |

2021-04-12 06:25:44 +0100 | commented answer | list of all prime powers -1 Thank you. But I want for arbitrary k :) |

2021-04-10 03:53:12 +0100 | edited question | list of all prime powers -1 list of all prime powers -1 The primes () method gives the list of all primes. Similarly, I need a list (Say PP) that co |

2021-04-10 03:53:11 +0100 | edited question | list of all prime powers -1 list of all prime powers -1 The primes () method gives the list of all primes. Similarly, I need a list (Say PP) that co |

2021-04-10 03:40:31 +0100 | edited question | list of all prime powers -1 list of all prime powers -1 The primes () method gives the list of all primes. Similarly, I need a list that consists of |

2021-04-10 03:40:02 +0100 | asked a question | list of all prime powers -1 list of all prime powers -1 The primes () method gives the list of all primes. Similarly, I need a list that consists of |

2021-04-10 02:32:28 +0100 | commented answer | Product of finite rings in sage Thank you :) |

2021-04-10 02:32:14 +0100 | marked best answer | Product of finite rings in sage How to implement the cartesian product of finite commutative rings with 1 with pointwise multiplication in sage? As far as I know, it is not there yet. So please help me with this. Thank you. |

2021-03-31 04:24:31 +0100 | asked a question | Product of finite rings in sage Product of finite rings in sage How to implement the cartesian product of finite commutative rings with 1 with pointwise |

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2021-03-30 16:22:32 +0100 | commented answer | construction of product rings Z/nZ x Z/mZ Thanks for the code. Someone, please explain to me how to use this code to construct the product of rings in jupiter? Th |

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2020-10-09 07:57:33 +0100 | commented question | Refinement between Lists of lists In the given link, they are checking whether a list is a sublist of another list or not. I am unable to see how it can be used here. Can you please explain it to me? Thank you. |

2020-10-09 07:55:29 +0100 | commented question | Refinement between Lists of lists @John Palmieri No. The order doesn't matter. In your previous comment if you meant [[0,1],[2]] is a refinement of [[1,0,2]] then it is a refinement. Thank you. |

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2020-10-09 05:38:52 +0100 | asked a question | Refinement between Lists of lists Consider the following lists of lists L1 = [[0,1,2],[1,2],[2,2]] and L2 = [[0,1],[2],[1,2],[1,2]]. We say that L2 is a refinement of L1. How to check whether a list of lists is a refinement of another list of lists in Sage. In the case of set partitions, we have the option refinement. But I need to work with the multisets and its multi partitions. So I am using lists and there is no refinement option for lists of lists. Kindly help me with how to implement this. Thank you. |

2020-10-09 02:49:00 +0100 | commented question | TypeError: unhashable type: 'list' in constructing poset @slelievre I have added the full code. Kindly check. Thank you. I directly feed M = [[0], [1, 2], [1, 2], [2, 2]] but it is throwing the same error message. |

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2020-10-08 08:21:09 +0100 | asked a question | TypeError: unhashable type: 'list' in constructing poset I have the following code to generate all multiset partitions of a given multiset (list). The above code gives me the following output I have the following code to generate a poset out of JJ in which the order is given by the refinement. I usually work with sets and my input JJ is usually a set partition and the program works well. Now, I am working with multisets (like [0,1,1,2,2,2,2]) and multi partitions (like [[0],[1,2],[1,2],[2,2]). By a multi-partition, I mean a partition in which each part is a multiset and parts can be repeated in a partition. So basically it is a list of lists. We cannot implement this using sets. I have codes given above to generate all such partitions in sage using lists. Now, the set of all multi partitions JJ (which is implements as a list) of a multiset (which is also implemented as a list) has to be fed as an input to the above code to generate the poset. But the above code throws the error How to overcome this issue? Kindly help me with this. Thank you. |

2020-10-08 05:23:09 +0100 | commented question | Multipartitions of a multiset in Sage @rburing. Thank you. It works. Cute idea. |

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2020-10-07 16:53:56 +0100 | asked a question | Multipartitions of a multiset in Sage Let L = [0,1,1,2,2,2,2,]. I want to generate all the multi-partitions of L in which each part can have repeated entries and the parts themselves can repeat in the partition. For example, [[0],[1,2],[1,2],[2,2]] is one such partition of L. Kindly help me with this. Thank you. |

2020-10-07 16:53:56 +0100 | asked a question | multipartitions of multisets in sage Let L be equal to the list [0,1,1,2,2,2,2]. I want to generate all the multiset partitions of L in which each part is a multiset (or a list with repeated entries) and parts are allowed to repeat. For example, [[0],[1,2],[1,2],[2,2]] is one such multi partitions. Kindly help me with this. Thank you. |

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