The proof uses the property of the Levi-Civita symbol to show that the dot product of the cross-product vector $S$ and any of the original vectors $v_k$ is zero. This is because the index notation creates a repeated index, which makes the symbol (and thus the dot product) vanish. The animation visually confirms this principle, showing $S$ remaining perpendicular to the two vectors that created it, while its dot product with an arbitrary third vector is non-zero, proving the orthogonality is specific.

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✍️Mathematical Proof

$\complement\cdots$Counselor

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The proof demonstrates that the vector $S$ is orthogonal to all original vectors $v_k$ by showing their dot product is zero. The argument hinges on a crucial property of the Levi-Civita symbol.

• Proof Method: The proof uses index notation to express the dot product $S \cdot v_k$. The core goal is to show this expression evaluates to zero.
• The Key Player: The Levi-Civita symbol ( $\varepsilon$ ) is the central element of the proof. Its fundamental property is that its value is zero if any two of its indices are the same. It's non-zero only when all its indices are unique.
• The Final Step: When the definition of $S$ is substituted into the dot product formula, the summation over indices forces one of the indices from the dot product term ( $a$ ) to become identical to one of the indices from the Levi-Civita symbol ( $i_k$ ). This creates a repeated index in the symbol, causing its value to become zero. Consequently, the entire dot product expression becomes zero, proving the orthogonality of $S$ to all $v_k$.

✍️Mathematical Proof

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1. Proving the Cross Product Rules with the Levi-Civita Symbol
2. Proving the Epsilon-Delta Relation and the Bac-Cab Rule
3. Simplifying Levi-Civita and Kronecker Delta Identities
4. Dot Cross and Triple Products
5. Why a Cube's Diagonal Angle Never Changes
6. How the Cross Product Relates to the Sine of an Angle
7. Finding the Shortest Distance and Proving Orthogonality for Skew Lines
8. A Study of Helical Trajectories and Vector Dynamics
9. The Power of Cross Products: A Visual Guide to Precessing Vectors
10. Divergence and Curl Analysis of Vector Fields
11. Unpacking Vector Identities: How to Apply Divergence and Curl Rules
12. Commutativity and Anti-symmetry in Vector Calculus Identities
13. Double Curl Identity Proof using the epsilon-delta Relation
14. The Orthogonality of the Cross Product Proved by the Levi-Civita Symbol and Index Notation
15. Surface Parametrisation and the Verification of the Gradient-Normal Relationship
16. Proof and Implications of a Vector Operator Identity
17. Conditions for a Scalar Field Identity
18. Solution and Proof for a Vector Identity and Divergence Problem
19. Kinematics and Vector Calculus of a Rotating Rigid Body
20. Work Done by a Non-Conservative Force and Conservative Force
21. The Lorentz Force and the Principle of Zero Work Done by a Magnetic Field
22. Calculating the Area of a Half-Sphere Using Cylindrical Coordinates
23. Divergence Theorem Analysis of a Vector Field with Power-Law Components
24. Total Mass in a Cube vs. a Sphere
25. Momentum of a Divergence-Free Fluid in a Cubic Domain
26. Total Mass Flux Through Cylindrical Surfaces
27. Analysis of Forces and Torques on a Current Loop in a Uniform Magnetic Field
28. Computing the Integral of a Static Electromagnetic Field
29. Surface Integral to Volume Integral Conversion Using the Divergence Theorem
30. Circulation Integral vs. Surface Integral
31. Using Stokes' Theorem with a Constant Scalar Field
32. Verification of the Divergence Theorem for a Rotating Fluid Flow
33. Integral of a Curl-Free Vector Field
34. Boundary-Driven Cancellation in Vector Field Integrals
35. The Vanishing Curl Integral
36. Proving the Generalized Curl Theorem
37. Computing the Magnetic Field and its Curl from a Dipole Vector Potential
38. Proving Contravariant Vector Components Using the Dual Basis
39. Verification of Orthogonal Tangent Vector Bases in Cylindrical and Spherical Coordinates
40. Vector Field Analysis in Cylindrical Coordinates
41. Vector Field Singularities and Stokes' Theorem
42. Compute Parabolic coordinates-related properties
43. Analyze Flux and Laplacian of The Yukawa Potential
44. Verification of Vector Calculus Identities in Different Coordinate Systems
45. Analysis of a Divergence-Free Vector Field
46. The Uniqueness Theorem for Vector Fields
47. Analysis of Electric Dipole Force Field

🧄Proof and Derivation-2

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