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CIRCLE WITH A DOT

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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.

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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
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          • 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.

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              • 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).

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                  • 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
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                    • 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...

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