Elements of Quaternions

ABCD algebra angle anharmonic arbitrary axis centre chord coefficients collinear comp Compare the Note complanar cone conic conjugate considered constant construction cubic cubic equation cyclic cylinder deduced denote derived differential diplanar direction ellipsoid equal expression formula function geometrical given curve given point harmonic conjugate imaginary intersection length line OA linear lines of curvature locus multiplication normal notation osculating circle osculating plane P₁ perpendicular positive quadric quinary quotient radius reciprocal rectangular represented respect right line right quaternions right quotient rotation round satisfied scalar second order SECTION sides sphere spherical sub-articles supposed surface symbol tangent plane tensor ternions theorem tion transformation twisted cubic vector versor vertex VIII whence whereof write