By Arthur S. Hathaway

ISBN-10: 1933998644

ISBN-13: 9781933998640

Illustrated, together with a variety of Examples - Chapters: Definitions And Theorems - heart Of Gravity - Curve Tracing, Tangents - Parallel Projection - Step Projection - Definitions And Theorems Of Rotation - Definitions Of flip And Arc Steps - Quaternions - Powers And Roots - illustration Of Vectors - formulation - Equations Of First measure - Scalar Equations, airplane And directly Line - Nonions - Linear Homogeneous pressure - Finite And Null traces - Derived Moduli, Latent Roots - Latent traces And Planes - Conjugate Nonions - Self-Conjugate Nonions - Etc., and so forth.

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**Extra info for A primer of quaternions - illustrated**

**Sample text**

Find the locus of the point P such that P P is cut in opposite ratios by the sphere of Ex. 1; show that it is the plane of contact of the tangent cone from P to the sphere and is perpendicular to AP . 4. Let P be any point on the sphere A of Ex. 1, and take P on OP so that OP · OP + c2 = 0; find the locus of P . [P , P are called inverse points with respect to O, and the locus of P is the inverse of the given sphere A. ] 5. Show that the inverse of a plane is a sphere through O. 6. Show that the general scalar equation of second degree is Sρφρ + 2Sδρ + d = 0, where φ is a self-conjugate nonion.

A point moves so that the ratio of its scalar distances from two fixed planes is constant; show that its locus is a plane. 5. A point moves so that its numerical distances from two intersecting lines are equal; find its locus. ] 6. A point moves so that its numerical distances from three fixed points are equal; find its locus. (a) The same with coplanar lines instead of points. ] CHAPTER 4. EQUATIONS OF FIRST DEGREE 47 7. Find the vector of the centre of the sphere whose surface passes through four given points.

Insert between the two terms of the first member of (e), the null term (αγβ − αγβ − γαβ + γαβ), and it becomes α(βγ + γβ) − (αγ + γα)β + γ(αβ + βα). Hence, using (55 c), we have (f ). (f) V αβγ = αSβγ − βSγα + γSαβ. Transpose the first term of the second member of (f ) to the first member, noting that αSβγ = V · αSβγ, and βγ − Sβγ = V βγ, and we have (g) V αV βγ = −βSγα + γSαβ; (g ) V · (V βγ)α = βSγα − γSαβ. CHAPTER 3. QUATERNIONS 38 (h) V · (V αβ)V γδ = −γSαβδ + δSαβγ = αSβγδ − βSαγδ. [(g), (d )] [(g ), (d )] (i) [(h)] δSαβγ = αSβγδ + βSγαδ + γSαβδ.

### A primer of quaternions - illustrated by Arthur S. Hathaway

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