Crossword

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Across
  1. 5. A term for a number that doesn't exist
  2. 6. a form of radiation in which complex numbers find its use
Down
  1. 1. Person recognised as a pioneer of Algebra education in the 16th century
  2. 2. Name of the place where an idea of imaginary
  3. 3. A branch of mathematics dealing mainly with the description of operations on numbers
  4. 4. Surname of an Italian mathematician who competes Gerolamo Cardano in the equation-solving duel
  5. 7. A Term for a number set that is an extension of the real numbers