figuratenum 0.6.0

A generator of infinite sequences of figurate numbers for Python.

FigurateNum

FigurateNum is a set of figurate number generators based on the book Figurate Numbers (2012) by Michel Deza and Elena Deza.

FigurateNum generates the following types of infinite sequences:

• 74 sequences of plane figurate numbers
• 79 sequences of space figurate numbers
• 18 sequences of multidimensional figurate numbers

What is the purpose of FigurateNum?

FigurateNum facilitates the discovery of new patterns among sequences and enables various numerical calculations in mathematical projects and related endeavors. It can be integrated with other software to visualize the geometric objects described. Moreover, it serves as a valuable companion to the book!

How to install?

pip install figuratenum

• It is advisable to use a virtual environment.

How to import figuratenum?

import figuratenum as fgn

How to use?

>>> seq = fgn.hyperdodecahedral_numbers()

>>> first = next(seq)
>>> second = next(seq)
>>> third = next(seq)
>>> fourth = next(seq)

>>> print(first, second, third, fourth)
1 600 4983 19468

You could get a list of numbers using a loop:

>>> generator = fgn.k_dimensional_centered_hypertetrahedron_numbers(21)
>>> sequence = []
>>> for _ in range(1, 15):
>>>     next_num = next(generator)
>>>     sequence.append(next_num)

>>> print(sequence)
[1, 23, 276, 2300, 14950, 80730, 376740, 1560780, 5852925, 20160075, 64512240, 193536720, 548354040, 1476337800]

Equivalently, using the array module:

import array as arr_num

>>> generator = fgn.aztec_diamond_numbers()
>>> sequence = arr_num.array('i')
>>> for _ in range(1, 15):
>>>     next_num = next(generator)
>>>     sequence.append(next_num)

>>> print(sequence)
array('i', [4, 12, 24, 40, 60, 84, 112, 144, 180, 220, 264, 312, 364, 420])

Plane figurate numbers

1. polygonal_numbers
2. triangular_numbers
3. square_numbers
4. pentagonal_numbers
5. hexagonal_numbers
6. heptagonal_numbers
7. octagonal_numbers
8. nonagonal_numbers
9. decagonal_numbers
10. hendecagonal_numbers
11. dodecagonal_numbers
12. tridecagonal_numbers
13. tetradecagonal_numbers
14. pentadecagonal_numbers
15. hexadecagonal_numbers
16. heptadecagonal_numbers
17. octadecagonal_numbers
18. nonadecagonal_numbers
19. icosagonal_numbers
20. icosihenagonal_numbers
21. icosidigonal_numbers
22. icositrigonal_numbers
23. icositetragonal_numbers
24. icosipentagonal_numbers
25. icosihexagonal_numbers
26. icosiheptagonal_numbers
27. icosioctagonal_numbers
28. icosinonagonal_numbers
29. triacontagonal_numbers
30. centered_triangular_numbers
31. centered_square_numbers = diamond numbers
32. centered_pentagonal_numbers
33. centered_hexagonal_numbers
34. centered_heptagonal_numbers
35. centered_octagonal_numbers
36. centered_nonagonal_numbers
37. centered_decagonal_numbers
38. centered_hendecagonal_numbers
39. centered_dodecagonal_numbers = star_numbers
40. centered_tridecagonal_numbers
41. centered_tetradecagonal_numbers
42. centered_pentadecagonal_numbers
43. centered_hexadecagonal_numbers
44. centered_heptadecagonal_numbers
45. centered_octadecagonal_numbers
46. centered_nonadecagonal_numbers
47. centered_icosagonal_numbers
48. centered_icosihenagonal_numbers
49. centered_icosidigonal_numbers
50. centered_icositrigonal_numbers
51. centered_icositetragonal_numbers
52. centered_icosipentagonal_numbers
53. centered_icosihexagonal_numbers
54. centered_icosiheptagonal_numbers
55. centered_icosioctagonal_numbers
56. centered_icosinonagonal_numbers
57. centered_triacontagonal_numbers
58. centered_mgonal_numbers
59. pronic_numbers = heteromecic_numbers = oblong_numbers
60. polite_numbers
61. impolite_numbers
62. cross_numbers
63. aztec_diamond_numbers
64. polygram_numbers(m) = centered_star_polygonal_numbers(m)
65. pentagram_numbers
66. gnomic_numbers
67. truncated_triangular_numbers
68. truncated_square_numbers
69. truncated_pronic_numbers
70. truncated_centered_pol_numbers(m) = truncated_centered_mgonal_numbers(m)
71. truncated_centered_hexagonal_numbers = truncated_hex_numbers
72. generalized_mgonal_numbers(m, start_numb)
73. generalized_centered_pol_numbers(m, start_numb)
74. generalized_pronic_numbers(start_numb)

Space figurate numbers

1. m_pyramidal_numbers(m)
2. triangular_pyramidal_numbers
3. square_pyramidal_numbers = pyramidal_numbers
4. pentagonal_pyramidal_numbers
5. hexagonal_pyramidal_numbers
6. heptagonal_pyramidal_numbers
7. octagonal_pyramidal_numbers
8. nonagonal_pyramidal_numbers
9. decagonal_pyramidal_numbers
10. hendecagonal_pyramidal_numbers
11. dodecagonal_pyramidal_numbers
12. tridecagonal_pyramidal_numbers
13. tetradecagonal_pyramidal_numbers
14. pentadecagonal_pyramidal_numbers
15. hexadecagonal_pyramidal_numbers
16. heptadecagonal_pyramidal_numbers
17. octadecagonal_pyramidal_numbers
18. nonadecagonal_pyramidal_numbers
19. icosagonal_pyramidal_numbers
20. icosihenagonal_pyramidal_numbers
21. icosidigonal_pyramidal_numbers
22. icositrigonal_pyramidal_numbers
23. icositetragonal_pyramidal_numbers
24. icosipentagonal_pyramidal_numbers
25. icosihexagonal_pyramidal_numbers
26. icosiheptagonal_pyramidal_numbers
27. icosioctagonal_pyramidal_numbers
28. icosinonagonal_pyramidal_numbers
29. triacontagonal_pyramidal_numbers
30. cubic_numbers
31. tetrahedral_numbers
32. octahedral_numbers
33. dodecahedral_numbers
34. icosahedral_numbers
35. truncated_tetrahedral_numbers
36. truncated_cubic_numbers
37. truncated_octahedral_numbers
38. stella_octangula_numbers
39. centered_cube_numbers
40. rhombic_dodecahedral_numbers
41. hauy_rhombic_dodecahedral_numbers
42. centered_tetrahedron_numbers = centered_tetrahedral_numbers
43. centered_square_pyramid_numbers = centered_pyramid_numbers
44. centered_mgonal_pyramid_numbers(m)
45. centered_pentagonal_pyramid_numbers
46. centered_hexagonal_pyramid_numbers
47. centered_heptagonal_pyramid_numbers
48. centered_octagonal_pyramid_numbers
49. centered_octahedron_numbers
50. centered_icosahedron_numbers = centered_cuboctahedron_numbers
51. centered_dodecahedron_numbers
52. centered_truncated_tetrahedron_numbers
53. centered_truncated_cube_numbers
54. centered_truncated_octahedron_numbers
55. centered_mgonal_pyramidal_numbers(m)
56. centered_triangular_pyramidal_numbers
57. centered_square_pyramidal_numbers
58. centered_pentagonal_pyramidal_numbers
59. centered_heptagonal_pyramidal_numbers
60. centered_octagonal_pyramidal_numbers
61. centered_nonagonal_pyramidal_numbers
62. centered_decagonal_pyramidal_numbers
63. centered_hendecagonal_pyramidal_numbers
64. centered_dodecagonal_pyramidal_numbers
65. centered_hexagonal_pyramidal_numbers = hex_pyramidal_numbers
66. hexagonal_prism_numbers
67. mgonal_prism_numbers(m)
68. generalized_mgonal_pyramidal_numbers(m, start_num)
69. generalized_cubic_numbers(start_num)
70. generalized_octahedral_numbers(start_num)
71. generalized_icosahedral_numbers(start_num)
72. generalized_dodecahedral_numbers(start_num)
73. generalized_centered_cube_numbers(start_num)
74. generalized_centered_tetrahedron_numbers(start_num)
75. generalized_centered_square_pyramid_numbers(start_num)
76. generalized_rhombic_dodecahedral_numbers(start_num)
77. generalized_centered_mgonal_pyramidal_numbers(m, start_num)
78. generalized_mgonal_prism_numbers(m, start_num)
79. generalized_hexagonal_prism_numbers(start_num)

Multidimensional figurate numbers

1. pentatope_numbers = hypertetrahedral_numbers = triangulotriangular_numbers
2. k_dimensional_hypertetrahedron_numbers(k) = k_hypertetrahedron_numbers(k) = regular_k_polytopic_numbers(k) = figurate_numbers_of_order_k(k)
3. biquadratic_numbers
4. k_dimensional_hypercube_numbers(k) = k_hypercube_numbers(k)
5. hyperoctahedral_numbers = hexadecachoron_numbers = four_cross_polytope_numbers = four_orthoplex_numbers
6. hypericosahedral_numbers = tetraplex_numbers = polytetrahedron_numbers = hexacosichoron_numbers
7. hyperdodecahedral_numbers = hecatonicosachoron_numbers = dodecaplex_numbers = polydodecahedron_numbers
8. polyoctahedral_numbers = icositetrachoron_numbers = octaplex_numbers = hyperdiamond_numbers
9. k_dimensional_hyperoctahedron_numbers(k) = k_cross_polytope_numbers(k)
10. four_dimensional_mgonal_pyramidal_numbers(m) = mgonal_pyramidal_numbers_of_the_second_order
11. k_dimensional_mgonal_pyramidal_numbers(k, m) = mgonal_pyramidal_numbers_of_the_k_2_th_order(k, m)
12. centered_biquadratic_numbers
13. k_dimensional_centered_hypercube_numbers(k)
14. centered_polytope_numbers
15. k_dimensional_centered_hypertetrahedron_numbers(k)
16. centered_hyperoctahedral_numbers = orthoplex_numbers
17. nexus_numbers
18. k_dimensional_centered_hyperoctahedron_numbers(k)

Contributing

FigurateNumber is currently under development, and we warmly invite your contributions. Just fork the project and then submit a pull request:

• Sequences from Chapters 1, 2, and 3 of the book
• New sequences not included in the book: If you have new sequences, please provide the source.
• Tests, documentation and errata in the book

When making commits, please use the following conventional prefixes to indicate the nature of the changes: feat, refactor, fix, docs, and test.

License

MIT License