By Arthur S. Hathaway
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, aircraft And instantly Line - Nonions - Linear Homogeneous pressure - Finite And Null lines - Derived Moduli, Latent Roots - Latent strains And Planes - Conjugate Nonions - Self-Conjugate Nonions - Etc., and so on.
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Extra resources for A Primer of Quaternions - Illustrated
Xρ + yσ) = xφρ + yφσ. This is immediately verified by putting xρ + yσ in the places occupied by the parentheses of φ and expanding the several terms. 72. We have ρ = xα + yβ + zγ, where α, β, γ are given non-coplanar vectors, and x, y, z, are scalars, each of first degree in ρ, as shown in 56(i ) with ρ in the place of δ; hence, (a) φρ = xφα + yφβ + zφγ. The complete operation of φ is therefore determined when the three vectors φα, φβ, φγ are known. , the multiples of the given non-coplanar vectors α, β, γ, that express it), therefore the value of φ depends upon nine scalar constants.
X, y, z, etc. ] Then, prove by direct multiplication, (c) −ρ2 = x2 + y 2 + z 2 = T ρ2 . (d) −Sρρ = xx + yy + zz = −sρ ρ. (e) vρρ = y y z z i+ z z x (f) −Sρρ ρ = x x y y y x x j+ x x y k = −V ρ ρ. y z z = −SρV ρ ρ . z Geometric Theorems 58. The angle of αβ equals the supplement of the angle θ between α, β. CHAPTER 3. QUATERNIONS 39 For, since αβ · β −1 = α, therefore αβ turns through the angle from β −1 to α, which is the supplement of the angle θ from α to β. • Cor. Sαβ = −T αβ cos θ, T V αβ = T αβ sin θ.
Show that if ψ 2 = φ, then the equation of the central quadric is (ψρ)2 + 1 = 0; and that therefore the quadric surface when strained by ψ becomes a spherical surface of unit radius. 16. Show that if g, α are corresponding latent root and direction of φ, then g n , α are the same for φn . Find the latent lines and planes, the latent roots and moduli of the following nonions and their powers: (a) (aαSβγρ + bβSγαρ + cγSαβρ)/Sαβγ. (b) [aαSβγρ + (aβ + bα)Sγαρ + (cγSαβρ]/Sαβγ. (c) [aαSβγρ + (aβ + bα)Sγαρ + (aγ + cβ)Sαβρ]/Sαβγ.