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2021-01-29 16:18:57 +0200 | asked a question | Functions with operation (multiplication) as argument Suppose I have functions $f$, $g_1$, $g_2$, $h$ and an operation $*$, which is not necessarily multiplication, satisfying the following relations: $$ f(X * Y) = g_1(X) g_2(Y) + g_1(Y) g_2(X) + f(X) * f(Y) + h(X * Y) $$ $$ h(X * Y) = h^2(X) * g_1(Y) $$ How to find a symbolic expression for $f(X^7)$? |

2021-01-21 16:26:34 +0200 | asked a question | Cluster transitivity The C =(number of triangles) × 3/(number of connected triples) Formula (7.28) Networks Mark Newman (2018) I would like to ask you about the method cluster_transitivity() It gives 0.0853107962707866 for this network:
http://snap.stanford.edu/data/email-E... , but a table from this page shows that Fraction of closed triangles is 0.03015. If I omit 3 in the formula (7.28) and I get 0.0284369320902622.
On this page: http://snap.stanford.edu/data/index.html (at the end), we have a definition of the fraction of closed triangles: Number of connected triples of nodes / number of (undirected) length 2 paths |

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2020-05-21 16:29:39 +0200 | answered a question | Kronecker Power of sparse matrices problem Yes, I made many errors. Sorry! I took some unchecked codes and translated it. I had in my mind the following solution: |

2020-05-12 13:10:38 +0200 | commented answer | Kronecker Power of sparse matrices problem Yes, this is typo, I repaired my code. It does not work as well. |

2020-05-02 22:36:12 +0200 | asked a question | Kronecker Power of sparse matrices problem Why the following code does not work? I try it also in loops. |

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2020-05-02 17:28:01 +0200 | answered a question | Graph indexed from zero Maybe faster than that: |

2020-05-02 17:01:38 +0200 | asked a question | Graph indexed from zero How to change vertices of a graph to that are indexed from 0? In Mathematica: ChangeVertices. We can change it to the adjacency matrix A and from A to the graph. A faster solution? Ho to get a permutation of vertices? |

2020-04-29 15:58:57 +0200 | asked a question | How to create url/file link in jupyter/sage? I have file/url: I would like to open (fast) this file/url in Jupyter in another card of Firefox. For example by one click. I use this file very often. How to do that? |

2020-04-29 11:39:31 +0200 | commented answer | Problem: Jupyter (Sage) with Numba and pypy What's about PyPy? |

2020-04-29 11:38:26 +0200 | commented answer | Problem: Jupyter (Sage) with Numba and pypy I now have (after the substitution): |

2020-04-28 22:21:46 +0200 | commented answer | Problem: Jupyter (Sage) with Numba and pypy Does not work. |

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2020-04-28 16:40:16 +0200 | commented answer | Problem: Jupyter (Sage) with Numba and pypy Now I get: |

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2020-04-28 12:42:46 +0200 | commented answer | Problems with AMS symbols in Sage, Jupyter Great! Thank you. |

2020-04-28 12:39:37 +0200 | asked a question | Problem: Jupyter (Sage) with Numba and pypy I install it by: How to use and import numba, pypy in sage. I get: when I run the following code (from https://numba.pydata.org/numba-doc/la... ) |

2020-04-28 12:38:12 +0200 | asked a question | Problem Jupyter (Sage) with numba and pypy How to use and import numba, pypy in sage. I get: ModuleNotFoundError: No module named 'numba' when I run the following code: |

2019-10-12 16:45:27 +0200 | asked a question | Problems with AMS symbols in Sage, Jupyter How to display the square (\square) symbol in a graph (Jupyter, maybe not only). Why \boxtimes is too large? I tried \box \square \emptybox etc. and I get: ValueError: F(G\,\square\,H) ^ Unknown symbol: \square (at char 5), (line:1, col:6) |

2019-10-12 16:45:27 +0200 | asked a question | Problems with AMS symbols in Sage, Jupyter How to display the square (\square) symbol in a graph (Jupyter, maybe not only). Why \boxtimes is too large? I tried \box \square \emptybox etc. and I get: ValueError: F(G\,\square\,H) ^ Unknown symbol: \square (at char 5), (line:1, col:6) |

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