MAT401 Crossword

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123456
Across
  1. 4. A list, typically generated according to a pattern, which can be described explicitly or recursively.
  2. 6. For curves defined by a focus and a directrix, this nonnegative number determines the shape of the curve. It is the distance to the focus divided by the distance to the directrix, measured from any point on the curve.
Down
  1. 1. Ellipses and hyperbolas have two such lines; a parabola has only one.
  2. 2. This is a rectangular array of numbers.
  3. 3. Ellipses and hyperbolas have two such points; a parabola has only one.
  4. 5. Something with magnitude and direction.