# AACA, Contents of Vol. 22, Issue 4

Dear Eckhard Hitzer,

 A Gröbner-Bases Algorithm for the Computation of the Cohomology of Lie (Super) Algebras Mansour Aghasi, Benyamin M.-Alizadeh, Joël Merker & Masoud Sabzevari

 On Some Characterizations of Ruled Surface of a Closed Timelike Curve in Dual Lorentzian Space Özcan Bekta? & Süleyman ?enyurt
 The Classical Two-Component Spinor Formalisms for General Relativity I J. G. Cardoso
 The Classical Two-Component Spinor Formalisms for General Relativity II J. G. Cardoso
 Monogenic Appell Sets as Representations of the Heisenberg Algebra David Eelbode
 The Balian-Low Theorem for the Windowed Quaternionic Fourier Transform Yingxiong Fu, Uwe Kähler & Paula Cerejeiras
 On a Quaternionic Analogue of the Cross-Ratio Ewain Gwynne & Matvei Libine
 The Quaternionic Equation ax + xb = c Jacques Helmstetter
 Initial Value Problems in Quaternionic Analysis with a Disturbed Dirac Operator Nguyen Quoc Hung
 Gravitation on a Homogeneous Domain Arkadiusz Jadczyk
 Rotations and Screw Motion with Timelike Vector in 3-Dimensional Lorentzian Space Osman Keçilio?lu, Siddika Özkaldi & Halit Gündo?an
 Clifford $${\mathcal{A}}$$-algebras of Quadratic $${\mathcal{A}}$$-Modules Patrice P. Ntumba
 Normalized System for the Super Laplace Operator Yuying Qiao, Hongfen Yuan & Heju Yang
 Majorana–Oppenheimer Approach to Maxwell Electrodynamics. Part I. Minkowski Space V. M. Red’kov, N. G. Tokarevskaya & George J. Spix
 Strapdown Inertial Navigation System Algorithms Based on Geometric Algebra Dimin Wu & Zhengzhi Wang

Source: Adapted from email by springeralerts_at_springer.delivery.net, 9 Nov. 2012.