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  esafak
  > Arrange the given block, if necessary, so that no ciphers [zeros] occur in its interior.I forgot that cipher used to have a different meaning: zero, via Arabic. In some languages it means digit.
• howling
  Terrence Tao blogged about this.https://terrytao.wordpress.com/2017/08/28/dodgson-condensati...
• kazinator
  > Dodgson’s original paper from 1867 is quite readable, surprisingly so given that math notation and terminology changes over time.Given that Jabberwocky is also quite readable, we shouldn't be too astonished.
• 01jonny01
  When I'm not cognitively depleted from over working and kids I'd really like to sit down and read this properly.
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  messe
  HN title filter cut off the initial "How".You can manually edit it back in.