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CIRCLE WITH A DOT

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  • tonwood@mathstodon.xyzT This user is from outside of this forum
    tonwood@mathstodon.xyzT This user is from outside of this forum
    tonwood@mathstodon.xyz
    wrote last edited by
    #1
    This post did not contain any content.
    johncarlosbaez@mathstodon.xyzJ tonwood@mathstodon.xyzT gregegansf@mathstodon.xyzG farbs@mastodon.socialF 4 Replies Last reply
    0
    • tonwood@mathstodon.xyzT tonwood@mathstodon.xyz
      This post did not contain any content.
      johncarlosbaez@mathstodon.xyzJ This user is from outside of this forum
      johncarlosbaez@mathstodon.xyzJ This user is from outside of this forum
      johncarlosbaez@mathstodon.xyz
      wrote last edited by
      #2

      @tonwood - are you trying to tell me something?

      tonwood@mathstodon.xyzT 1 Reply Last reply
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      • johncarlosbaez@mathstodon.xyzJ johncarlosbaez@mathstodon.xyz

        @tonwood - are you trying to tell me something?

        tonwood@mathstodon.xyzT This user is from outside of this forum
        tonwood@mathstodon.xyzT This user is from outside of this forum
        tonwood@mathstodon.xyz
        wrote last edited by
        #3

        @johncarlosbaez Maybe I'm trying not to tell you something.

        johncarlosbaez@mathstodon.xyzJ 1 Reply Last reply
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        • tonwood@mathstodon.xyzT tonwood@mathstodon.xyz

          @johncarlosbaez Maybe I'm trying not to tell you something.

          johncarlosbaez@mathstodon.xyzJ This user is from outside of this forum
          johncarlosbaez@mathstodon.xyzJ This user is from outside of this forum
          johncarlosbaez@mathstodon.xyz
          wrote last edited by
          #4

          @tonwood - In that case you would have succeeded.

          1 Reply Last reply
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          • tonwood@mathstodon.xyzT tonwood@mathstodon.xyz
            This post did not contain any content.
            tonwood@mathstodon.xyzT This user is from outside of this forum
            tonwood@mathstodon.xyzT This user is from outside of this forum
            tonwood@mathstodon.xyz
            wrote last edited by
            #5

            Of the 924 ways to choose six segments out of twelve, these 306 are connected.

            lisyarus@mastodon.gamedev.placeL 1 Reply Last reply
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            • tonwood@mathstodon.xyzT tonwood@mathstodon.xyz

              Of the 924 ways to choose six segments out of twelve, these 306 are connected.

              lisyarus@mastodon.gamedev.placeL This user is from outside of this forum
              lisyarus@mastodon.gamedev.placeL This user is from outside of this forum
              lisyarus@mastodon.gamedev.place
              wrote last edited by
              #6

              @tonwood That right here is an alphabet!

              tonwood@mathstodon.xyzT 1 Reply Last reply
              0
              • tonwood@mathstodon.xyzT tonwood@mathstodon.xyz
                This post did not contain any content.
                gregegansf@mathstodon.xyzG This user is from outside of this forum
                gregegansf@mathstodon.xyzG This user is from outside of this forum
                gregegansf@mathstodon.xyz
                wrote last edited by
                #7

                @tonwood

                This is very cool!

                Here are representatives of the 45 orbits of these figures under the group D_4 (the eight rotations and reflections that are isometries of a square), so no pair of these 45 figures are rotations/reflections of each other.

                Link Preview Image
                svengeier@mathstodon.xyzS 1 Reply Last reply
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                • lisyarus@mastodon.gamedev.placeL lisyarus@mastodon.gamedev.place

                  @tonwood That right here is an alphabet!

                  tonwood@mathstodon.xyzT This user is from outside of this forum
                  tonwood@mathstodon.xyzT This user is from outside of this forum
                  tonwood@mathstodon.xyz
                  wrote last edited by
                  #8

                  @lisyarus Or rather a syllabary.

                  My motive in listing these figures was to design a script made from a limited repertoire of elements, without the sameness of Tengwar. And syllabaries are under-represented in fantasy scripts, though they are the most common stage after logographies.

                  1 Reply Last reply
                  0
                  • tonwood@mathstodon.xyzT tonwood@mathstodon.xyz
                    This post did not contain any content.
                    farbs@mastodon.socialF This user is from outside of this forum
                    farbs@mastodon.socialF This user is from outside of this forum
                    farbs@mastodon.social
                    wrote last edited by
                    #9

                    @tonwood interesting idea to limit it to exactly six. I guess at least that excludes a certain hate speech symbol 😬

                    tonwood@mathstodon.xyzT 1 Reply Last reply
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                    • farbs@mastodon.socialF farbs@mastodon.social

                      @tonwood interesting idea to limit it to exactly six. I guess at least that excludes a certain hate speech symbol 😬

                      tonwood@mathstodon.xyzT This user is from outside of this forum
                      tonwood@mathstodon.xyzT This user is from outside of this forum
                      tonwood@mathstodon.xyz
                      wrote last edited by
                      #10

                      @Farbs Fixing the number makes for inherent error-detection; and using exactly half maximizes the set of choices (before weeding out the disconnected).

                      1 Reply Last reply
                      0
                      • gregegansf@mathstodon.xyzG gregegansf@mathstodon.xyz

                        @tonwood

                        This is very cool!

                        Here are representatives of the 45 orbits of these figures under the group D_4 (the eight rotations and reflections that are isometries of a square), so no pair of these 45 figures are rotations/reflections of each other.

                        Link Preview Image
                        svengeier@mathstodon.xyzS This user is from outside of this forum
                        svengeier@mathstodon.xyzS This user is from outside of this forum
                        svengeier@mathstodon.xyz
                        wrote last edited by
                        #11

                        @gregeganSF @tonwood
                        These two sure 𝑙𝑜𝑜𝑘 like mirror images to me...

                        gregegansf@mathstodon.xyzG 1 Reply Last reply
                        0
                        • svengeier@mathstodon.xyzS svengeier@mathstodon.xyz

                          @gregeganSF @tonwood
                          These two sure 𝑙𝑜𝑜𝑘 like mirror images to me...

                          gregegansf@mathstodon.xyzG This user is from outside of this forum
                          gregegansf@mathstodon.xyzG This user is from outside of this forum
                          gregegansf@mathstodon.xyz
                          wrote last edited by
                          #12

                          @SvenGeier @tonwood

                          Yes, they are mirror images if you ignore the position of the white space within the square.

                          So if I was trying to construct, say, a set of unique wooden objects that could be rotated and flipped over, it would only contain one of that pair.

                          Similarly, the last two figures in the original post’s third-last row look like they are duplicates, but one has a column of white space on the left, the other has it on the right.

                          svengeier@mathstodon.xyzS 1 Reply Last reply
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                          • gregegansf@mathstodon.xyzG gregegansf@mathstodon.xyz

                            @SvenGeier @tonwood

                            Yes, they are mirror images if you ignore the position of the white space within the square.

                            So if I was trying to construct, say, a set of unique wooden objects that could be rotated and flipped over, it would only contain one of that pair.

                            Similarly, the last two figures in the original post’s third-last row look like they are duplicates, but one has a column of white space on the left, the other has it on the right.

                            svengeier@mathstodon.xyzS This user is from outside of this forum
                            svengeier@mathstodon.xyzS This user is from outside of this forum
                            svengeier@mathstodon.xyz
                            wrote last edited by
                            #13

                            @gregeganSF @tonwood I guess I'll leave the "whitespace is significant" to the Python programmers...

                            1 Reply Last reply
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