This is the demonstration of the dual anti-symmetry of the generalised Kronecker delta. Defined as a determinant, it is completely anti-symmetric in both its contravariant (upper) indices and its covariant (lower) indices. The derived relation, confirms that anti-symmetrising the covariant indices of the simple Kronecker delta product yields the generalised delta, mirroring the given result for contravariant index anti-symmetrisation. Crucially, the factor inherently present in the definition of the anti-symmetrisation operator, resulting in the determinant definition.

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Dual Anti-Symmetry of the Generalised Kronecker Delta.mp4

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1. Symmetric and Antisymmetric Components
2. Symmetry and the Zero Tensor
3. Independent Components and Tensor Symmetry
4. Proof of the Contravariant Nature of the Inverse Metric Tensor
5. Christoffel Symbols Geometric Change in Cylindrical Coordinates
6. Geometric Meaning of Arc Length in Spherical Coordinates
7. Curvilinear Coordinate Systems and Their Metrics
8. Impact of Non-Orthogonal Coordinates on Geometric Measurement
9. Partial vs Covariant Derivative The Core Difference
10. Core Properties of the Covariant Derivative
11. Tensor Derivation and Verification of Spherical Divergence
12. Consistency of the Tensor-Based Laplace Operator in Cylindrical Coordinates
13. Scale Factor Dependence of Tangent Basis Vector Divergence
14. The General Coordinate Laplacian Formula
15. Tensor Density Algebra-Weight and Rank Rules
16. Path-Independence of Tensor Densities via the Jacobian Product Rule
17. Impact of Coordinate Scaling on Metric and Cross Product
18. Vanishing Divergence of the Levi-Civita Tensor Explained
19. Tensor Formulation of Vector Calculus Operations
20. Curl of the Dual Basis is Always Zero
21. Dual Anti-Symmetry of the Generalised Kronecker Delta
22. The Orthogonality and Invariance of Cartesian Affine Transformations
23. Mass Density as the Integrating Factor
24. Curvilinear Area Element Derivation via Jacobian
25. The Interdependence of Elastic Constants
26. Magnetic Stress Tensor via Field Tensors
27. Field Tension Mediates Repulsion and Ensures Static Equilibrium
28. Zero Total Force for a Source-Free Volume
29. the Rotational Identity Derivation and Its Physical Significance
30. Non-Constant Inertia and Dynamic Coupling
31. Centrifugal Force Tensor Structure and Vanishing Conditions
32. Properties and Physical Effects of the Gravitational Tidal Tensor
33. Magnetic Force Transmission via the Stress Tensor
34. Maxwell's Inhomogeneous Pair in Relativistic Notation
35. The Metric Orthogonality and Curvature in Spherical Coordinates
36. The Covariant Divergence of an Antisymmetric Tensor in Curved Spacetime
37. Contraction of the Christoffel Symbol and Its Relation to the Metric's Logarithmic Derivative
38. The Non-Tensorial Nature of Christoffel Symbols and Their Role in Connection and Fictitious Forces
39. The Covariant Nature of a Scalar Field's Partial Derivatives (The Gradient)
40. Using the Metric Tensor to Convert Contravariant to Covariant Components
41. Decomposing Tensors into Unique Symmetric and Anti-Symmetric Components
42. The Invariant Nature of Tensor Symmetry Under Coordinate Transformations
43. Defining the Transformation Law for a Type (0,2) Tensor Through Scalar Invariance
44. The Coordinate Invariance of Tensor Contraction
45. Operations That Preserve Tensor Nature
46. Current Density and Electric Field Alignment in Anisotropic Media
47. Electric Susceptibility as a Rank Two Tensor
48. Verification of the Rank Two Zero Tensor Properties
49. Transformation of the Rotating Polar Tensor Basis to Cartesian Coordinates
50. Derivation of Mixed Tensor Transformation Properties </aside>