The Fitful Flog

August 14, 2007

Fall Down Seven Times

Seven-Pointed Star Bowl Side

I’ll tell you a medieval secret — I know a lot of them — the reason that medieval builders, artists and poets were so superstitious about the number seven is that it was so difficult for them to deal with it. Try doing long division (iron division, we called it then) with seven in Roman numerals. So very unpleasant, we only did it during Lent. Try dividing things with seven on a pocket calculator. Even when expressed in the ho-hum, prosaic Arabic numerals, the beauty of the repeating decimals will give you the mystical willies, tell you what.

It’s an odd number, seven is.

If you draw a heptagon (or better, fold one) and connect every second corner, you’ll get a lovely heptagram. If you connect every third corner, you get a different, but no less lovely heptagram.

If you fold the first heptagram and than fold the other heptagram inside it, well, you’ll get this model. Spooky, hunh?

7-Pointed Star Bowl Crease Pattern

Almost certainly a variation of an existing fold.

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4 Responses to “Fall Down Seven Times”

  1. 1
    d'gou Says:

    Very cool! And Shen-esque to boot!

  2. 2
    Mélisande* Says:

    Some superficial similarities with the octagonal star vase, but yours is more sophisticated.

  3. 3
    jay Says:

    hey., i always enjoy reading ur blog. i try doing these as much as i can. its intresting since u take cirle as ur base and not the usual square and come up with novel ideas. keep up the good work and thanks for sharing all this =)

  4. 4
    oschene Says:

    Thanks, all — and hey to Jay in Mumbai.

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