Sentence Examples

  • And when the two factor lines are at right angles to one another, or 0=42, the product is simply ix" -}-jy"-}-kz", the unit line perpendicular to both.
  • Here, then, is a case specially adapted to the isotropy of the quaternion system; and Hamilton easily saw that the expression i d x +j - + k dz could be, like ix+jy+ kz, effectively expressed by a single letter.
  • Suppose, therefore, that the equation of the boundary is r =a+a cos kz, (I) where a is a small quantity, the axis of z being that of symmetry.