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Electroconvection is a classical example of pattern-forming phenomena in liquid crystals, typically observed in nematics with negative dielectric and positive conductivity anisotropies. This article focuses on how electroconvection in the homeotropic geometry differs from that in planar alignment. The influence of an additional magnetic field on the pattern characteristics and on secondary instabilities (the normal roll-abnormal roll transition) is discussed. The homeotropic alignment offersdoi:10.1080/01411590500185278 fatcat:rhzupeblwvbdzhghxgcmuq7fle