Newton's method for roots on the soroban

  Sir Isaac Newton A non-traditional technique Square, cube and fifth roots can be solved on the abacus using Newton's method. It is not...

  • Cargill G. Knott and the abacus
     A Scottish scientist writes about soroban Prof. Cargill G. Knott Cargill Gilston Knott  (30 June 1856 – 26 October 1922) was a Scottish phy...
  • The fifth lower bead
    A more efficient use of the abacus Ancient abacuses, both Japanese style (soroban) and Chinese style (suanpan), used to have five beads on t...
  • Newton's method for roots on the soroban
      Sir Isaac Newton A non-traditional technique Square, cube and fifth roots can be solved on the abacus using Newton's method. It is not...