What is Vector algebra: Definition and 74 Discussions

In mathematics, vector algebra may mean:

Linear algebra, specifically the basic algebraic operations of vector addition and scalar multiplication; see vector space.
The algebraic operations in vector calculus, namely the specific additional structure of vectors in 3-dimensional Euclidean space





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of dot product and especially cross product. In this sense, vector algebra is contrasted with geometric algebra, which provides an alternative generalization to higher dimensions.
An algebra over a field, a vector space equipped with a bilinear product
Original vector algebras of the nineteenth century like quaternions, tessarines, or coquaternions, each of which has its own product. The vector algebras biquaternions and hyperbolic quaternions enabled the revolution in physics called special relativity by providing mathematical models.

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  1. S

    Wave Vector Algebra: Proving k = 2∏/λ

    Homework Statement I'm having difficulty showing that the general equation k = 2∏/λ holds from the component equations kx = 2∏/λx etc..., k = √(kx2 + ky2 + kz2), and λ = √(λx2 + λy2 + λz2). Any help? There is a photo from a textbook with the equations also below. Homework Equations...
  2. S

    Numerical problem on vector algebra - components of vectors

    Homework Statement Two beetles run across flat sand, starting at the same point. Beetle 1 runs 0.50m due east, then 0.80m at 30° north of due east. Beetle 2 also makes two runs; the first is 1.6m at 40° east of due north. What must be (a) the magnitude and (b) the direction of its second run...
  3. S

    Vector Algebra for Diamond Unit Cell: Neighbouring Atoms and Bond Angles

    Homework Statement A unit cell of diamond is a cube of side A, with carbon atoms at each corner, at the centre of each face and, in addition, at positions displaced by 0.25A(i + j + k) from each of those already mentioned; i, j, k are unit vectors along the cube axes. One corner of the cube...
  4. S

    Solving Vector Addition with Wind and Velocity

    1. An air ambulance is traveling from Barrie to Toronto. Toronto is located 90 km (S 5° E) of Barrie. If the wind is blowing from the South with a velocity of 62 km/h, and the plane's air speed is 375 km/h, what direction must the pilot fly to make it to Toronto? 2. Let u=<u_{1},u_{2}>...
  5. O

    Vector Algebra Help: FAQs, Tutorials, Forums

    I need general help with vector algebra. Is there a FAQ, tutorial, or section of the forums here that I should look at?
  6. L

    Exploring Parallelogram Diagonals: Vector Algebra

    Homework Statement P is the point where the diagonals of the parallelogram abcd intersect one another let \alpha = AB and \beta = AD and let s and t be scalars such that AP = sAC and BP = tBD use vector algebra to show that s(\alpha + \beta) = AP = \alpha + t(\beta - \alpha)The Attempt at...
  7. S

    Deriving angular velocity vector algebra?

    where x represents cross product currently if i forget i figure these out using the right hand rule, but how do you get each equation visa versa using vector algebra i started with w = rxv how do you derive that v = wxr i got up to this w = rxv w= -(vxr) rxw = -rx(vxr) rxw =...
  8. J

    Defining a statement (Vector Algebra)

    Homework Statement Let V be a vector space over the field F. Define what is meant by the statement "For vectors v1, v2,...,vn belonging to V, the set {v1,v2,...,vn} spans V Homework Equations None The Attempt at a Solution Does it mean that the set is linearly dependent?
  9. I

    Someone please check my simple vector algebra

    Homework Statement Velocity vector for a .5kg body, t=1s to t=35s, is v=5t^2 i + 3/t j – t k WHat is the position vector? what is the angular momentum vector?what is the acceleration vector? what is torque exerted on the body? Homework Equations L=rxp=rxmv T=rxf=rxma The Attempt at...
  10. N

    Vector Algebra (line perpendicular to plane)

    Homework Statement Find the parametric equations for the line which passes through the point (3,5,7) and parallel to the vector <2,6,8>. Is the line perpendicular to the plane 5x + 6y +7z = 10? Homework Equations line equation, r = Ro + tV The Attempt at a Solution line...
  11. H

    Vector Algebra - Vector Triple Product Proof

    Homework Statement Prove, by writing out in component form, that \left(a \times b \right) \times c \equiv \left(a \bullet c\right) b - \left(b \bullet c\right) aand deduce the result, \left(a \times b\right) \times c \neq a \times \left(b \times c\right), that the operation of forming the...
  12. V

    Vector Algebra: Find Parametric Equation of Line from p with Direction q

    p = (2,6,3) q = (1,0,1) r = (4,1,-1) part a) Find a parametric equation of the line that passes through p with direction q x=p + t(q) x=(2,6,3) + t(1,0,1) part b) find the point X on the line in part a so that RX is perpendicular to the line I'm having trouble doing this one...
  13. F

    Shortest distance between two lines (vector algebra)

    Homework Statement line l1 : x=2 y= -1 + p z= 2p line l2 : x=-1 + t y=1-3t z=1-2t Find the shortest (exact) distance between l1 and l2. Homework Equations That's what I am looking for! The Attempt at a Solution Thanks!
  14. R

    Applications of vector algebra to physics

    Homework Statement A ball of mass 1 kg is acted upon by three forces: Fl = (2i + 4j - 3k) N, F2 = (-3i - j + 2k) Nand F3 = (i - 5j - k) N. Determine a vector expression for the acceleration of the particle. If, at time t = 0, it has position r = (i +j) m and velocity u = (i +3j)m/s...
  15. M

    Transformation matrix, vector algebra word problem

    Hi everyone. I am not sure if this problem belongs under the "Linear & Abstract algebra" section but it seemed like it may. Please let me know if there is a different section that would better fit this problem. So here is a word problem that is proposed: A solar panel is capable of rotating...
  16. R

    Where Can I Find Vector Algebra Videos for Electromagnetic Studies?

    Dear all, Anyone happan to have good online lecture video links on Vector Algebra? I need to get an understanding of things like 'Curl', 'Divergence' etc which I will be using it for my Electromagnetic module. Any help/advise will be greatly appreciated. Thanks in advance. Regards
  17. P

    Vector Algebra: Proving Mutually Perpendicular Vectors

    Homework Statement a(v), b(v) and c(v) are three vectors. if a(v) x b(v) = c(v) and b(v) x c(v)= a(v) Show that b(mod)= 1 and a(mod)=c(mod) and the three vectors are mutually perpendicular. (v) denotes vector and (mod) denotes magnitude. [b]2. Homework Equations [/] NA. The Attempt...
  18. M

    Complex four vector algebra in relativity

    Complex four vector spacetime algebras in relativity Does anyone have any experience or references as to the usefulness and applicability of this in relativity?
  19. R

    Vector Algebra & Analytcc geometry in space

    Please can somebody help me to find video tutorials or e-books for these
  20. R

    Vector Algebra & Analitic Geometry in Space

    Can somebody tell me where I can find these e-books.please help me.Thank you all
  21. D

    Linear & Vector Algebra: Kronecker delta & Levi-Civita symbol

    Hello all. Happy to have finally found this forum, sorry that it took so long! I'm working through a Vector Algebra tutorial and I am having much difficulty with the concepts of Kronecker deltas and the Levi-Civita symbol. I can't fully grasp either of them intiutively. From what I've been...
  22. M

    Lorentz Force Law, am i messing up vector algebra?

    Okay here is my work: http://show.imagehosting.us/show/891312/0/nouser_891/T0_-1_891312.jpg and here is my calculations part: http://img136.imageshack.us/img136/5539/lastscan7qc.jpg Problem says: 14. [HRW7 28.P.008.] An electron has an initial velocity of (14.0 j + 21.0 k) km/s and a...
  23. T

    Finding the Unit Vector Orthogonal to a Defined Plane

    hello, I'm taking electrodynamics, and to begin we're doing vector algebra/calculus. here's the problem I'm faced with. there's a triangle defined by the points. (1,0,0) (0,2,0) (0,0,3) the task at hand is finding the unit vector orthogonal to the defined plane. the method that...
  24. T

    How can I use trigonometric functions to simplify my vector algebra problem?

    I hate Vector Algebra! I am having some trouble doing some vector algebra and any help or direction is greatly appreciated. In our lecture we drew a vector C(s) = A + s(B-A) which described a line passing through points A and B and found that the vector of min. length (shortest dist. from...
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