Alterman Conference on Geometric Algebra


ENID & STANLEY

August 1^{st} 9^{th} 2016 Brasov (Romania)
Summer School Teachers First Part: Rafal Ablamowicz, Zbigniew Oziewicz, Jose Vargas, Nikolay Marchuk, Ramon González. Second and Third Parts: Jose Vargas, Zbigniew Oziewicz
Timetable The timetable of the Summer School can be downloaded here.
Program (updated on April, 6^{th}) First Part: Introduction to Geometric
Algebra Introduction. Two pedestrian approaches to exterior algebra. Two pedestrian approaches to Clifford algebra. Comparison of exterior and Clifford algebras, grading and the common module. Basic examples of Clifford algebra. Development of Clifford concepts: using Pauli (3D) algebra. Grade involution, reversion and Clifford conjugation. The even subalgebra. The unit pseudoscalar. Hodge dual of a Clifford element. Reciprocal frames. Vector product. Reflections and rotations. Product of rotations. Lorentz transformations. Revisited concepts, now in the Dirac algebra (4D). Lorentz transformations. We are not overlooking: complex algebra and quaternion algebra. Arbitrary dimension. Exterior products: linear independence, volumes, exterior products of multivectors. Clifford product of vector by multivector. Grade involution. Product of a vector by an arbitrary element of the algebra. Exchange of the orders of factors. Distributive property of the interior product of a vector with respect to exterior and Clifford products. Interior products of multivectors. Connection of pedestrian approaches with formal definitions. Idempotents. Ideals. Decompositions. Application of geometric algebra to plane geometry. The Euclidean and hyperbolic planes. Complex versus hyperbolic analysis. Euclidean and hyperbolic reflections and rotations, and other transformations of vectors. Similarity of triangles expressed with geometric algebra. Notable points of a triangle. Euler's line and its direction vector. Proofs of theorems of plane geometry with geometric algebra. Projective cross ratio and a proof of Chasles' theorem. Application of geometric algebra to the threedimensional spaces. Hamilton's definition of quaternions as quotients of vectors in the Euclidean space. Rotations and its composition. Barycenter, circumcentre, incentre, Monge's point and Euler's line of a tetrahedron. Spherical trigonometry. Lobachevsky geometry and trigonometry in the pseudoEuclidean space. Tutorial on CLIFFORD with eClifford and Bigebra: A Maple Package for Clifford and Grassmann Algebras. A Maple Package for Clifford and Grassmann Algebras. A quick start on Cl_{p,q}(B) or Cl_{p,q,r} in CLIFFORD or eCLIFFORD. Notation and basic computations in more details. Builtin database in Clifford algebras Cl_{p,q} when p+q ≤ 9. Mathematical design of CLIFFORD based on Chevalley's definition of Clifford algebra. Algorithms for Clifford product in Cl(B): cmulNUM, cmulRS, cmulWalsh3 for algebras Cl_{p,q}. Special new package eCLIFFORD for fast computations in Clifford algebras Cl_{p,q,r}. A fast algorithm ecmul for Clifford product in Cl_{p,q,r} based on Walsh functions (a modified cmulWalsh3). Algebraic operations in Cl(B). Research with CLIFFORD and related packages, such as SymGroupAlgebra. On parallelizing the Clifford product in CLIFFORD. Using periodicity theorems in higher dimensional Clifford algebras or using eCLIFFORD. Matrix representations and spinors. Representation of Clifford algebras with square matrices. Table of matrix representations. Isomorphisms of Clifford algebras. Periodicity theorems. Spinors. Application of spinors to quantum mechanics. Exterior Calculus. The concept of differential form in Kähler. Revisiting concepts of exterior algebra. The exterior derivative and general Stokes theorem. Maxwell's equations. Currents as Cartan invariants not at constant time. The true nature of the energymomentum tensor.
Second Part: Kähler calculus August 4^{th} Concept of Kähler algebra and of its differential forms. The Kähler algebra of the real plane and its even subalgebra. The angular integral. Splits and subsplits of spacetime's Kähler algebra. Idempotents. Ideals. Primitive idempotents. Theorems of residues and of Cauchy by means of just real algebra and standard calculus. Templates of ideals to come down from 32 real components of "wave functions" to 16 and then 8 components (Dirac spinors) in complex spacetime Kähler algebra. August 5^{th} Kähler on the general differentiaiton of (p,q)tensorvalued differential rforms. The Kähler and Cartan approaches to Kähler differentiation. Covariant differentiation. Leibniz rules. Hodge dual, coderivative and Laplacians. Harmonic, strict harmonic and constant differentials. Helmholtz theorem for differential 1forms and 2forms in 3D Euclidean space. Cauchy calculus with real differential forms. Cauchy calculus versus exterior and Kähler calculus. August 6^{th} Solutions with time symmetry of exterior systems. Kähler equations. Electromagnetic coupling. Dominant energy solutions. Kähler version of the PauliDirac equation and of the FoldyWouthuysen Hamiltonian and comparison with standard relativistic quantum mechanics. The fine structure of the hydrogen atom. Dirac theory as contrived, nonspontaneous, when judged from Kähler's theory.
Third part: Applications of Kähler
Calculus August 8^{th} Lie derivatives as partial derivatives. Separation of the emerging spin and orbital terms of the third component of total angular momentum. Killing symmetry. The algebraic form of the spin operator. Total angular momentum and its square. Scalar products of differential forms of different grades. A quadratic conservation law in the Kähler calculus. The emergence of the concept of charge. Superseding of Hodge's theorem by solving the exterior system that specifies the curl and divergence of a differential form of homogeneous grade. Further showing of Dirac theory as contrived, nonspontaneous, when judged from Kähler's theory. August 9^{th} Rotations with Clifford algebra. Geometrization of the imaginary unit in relativistic quantum mechanics. Real idempotents for rotational and time translation symmetries. Tensor product of Kähler algebra and tangent Clifford algebra. Reflection on the foundations of differential geometry as argument for canonical KaluzaKlein geometry. Impact on our understanding of flat spacetime geometry. Extension of positronelectron to other leptonic generations. Mirror symmetric elements of that tensor product of algebras. Implications of the commutativity of those elements for the extension of the system of primitive idempotents. Quarks.
FACULTY OF MATHEMATICS & INFORMATICS TRANSILVANIA UNIVERSITY OF BRASOV

ERICH KÄHLER 


