In this OCW course, the lecture Linear Algebra and Geometry I, held in WiSe 2016/2017, is presented in structure, construction and sequence. This lecture is one of the four basic lectures that are obligatory for all students of mathematics in their first year of study.

In this OCW course the lecture Linear Algebra and Geometry II held in SoSe 2017 is presented in structure, construction and sequence. This lecture is one of the four basic lectures that are obligatory for all students of mathematics in their first year of study.

The video gives an introduction to the layout and handling of a light microscope as it is used in the basic practical courses of the Faculty of Biology and Biotechnology at the Ruhr University Bochum.

The video gives an introduction to the so-called Köhlering of a light microscope, i.e. the adjustment of optimal contrast and brightness according to the method developed by August Köhler, which can be carried out for most light microscopes in this or a similar form.