File:Nimbers 0...15 multiplication.svg

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Multiplication table of Nimbers; compare Sloane'sA051775, Sloane'sA051910

The nonzero elements form the Cayley table of Z15, as shown below.

Below the dual matrix, showing permuted binary Walsh matrices.
The dark gray fields have an odd binary digit sum, and also form a permuted binary Walsh matrix.
A closer look at these five permutations can be found here.

Image set Operation tables with binary digits (16×16 with dual matrices)
This SVG was created with Inkscape.
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Watchduck
You can name the author as "T. Piesk", "Tilman Piesk" or "Watchduck".

Cyclic group edit

Nimber multiplication
 1   4   6  14   5   2   8  11   7  10   3  12  13   9  15
 4   6  14   5   2   8  11   7  10   3  12  13   9  15   1
 6  14   5   2   8  11   7  10   3  12  13   9  15   1   4
14   5   2   8  11   7  10   3  12  13   9  15   1   4   6
 5   2   8  11   7  10   3  12  13   9  15   1   4   6  14
 2   8  11   7  10   3  12  13   9  15   1   4   6  14   5
 8  11   7  10   3  12  13   9  15   1   4   6  14   5   2
11   7  10   3  12  13   9  15   1   4   6  14   5   2   8
 7  10   3  12  13   9  15   1   4   6  14   5   2   8  11
10   3  12  13   9  15   1   4   6  14   5   2   8  11   7
 3  12  13   9  15   1   4   6  14   5   2   8  11   7  10
12  13   9  15   1   4   6  14   5   2   8  11   7  10   3
13   9  15   1   4   6  14   5   2   8  11   7  10   3  12
 9  15   1   4   6  14   5   2   8  11   7  10   3  12  13
15   1   4   6  14   5   2   8  11   7  10   3  12  13   9

Table of the same operation, showing the characteristic diagonals of a cyclic group's Cayley table

In both tables it can be seen, that e.g. 4 * 7 = 10

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Date/TimeThumbnailDimensionsUserComment
current17:20, 7 August 2016Thumbnail for version as of 17:20, 7 August 20161,127 × 1,407 (462 KB)Stunts1990 (talk | contribs)Made the multiplication indices darker against the transparent background and thus more prominent.
21:57, 18 January 2014Thumbnail for version as of 21:57, 18 January 20141,127 × 1,407 (461 KB)Watchduck (talk | contribs)correct gray background
21:44, 18 January 2014Thumbnail for version as of 21:44, 18 January 20141,127 × 1,407 (448 KB)Watchduck (talk | contribs)layout
21:35, 6 February 2011Thumbnail for version as of 21:35, 6 February 2011738 × 889 (1.62 MB)Watchduck (talk | contribs)bigger
21:22, 6 February 2011Thumbnail for version as of 21:22, 6 February 201174 × 89 (1.62 MB)Watchduck (talk | contribs)

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