Astronomy and mathematics in the plant world
- Brötchen-und-Borussia

A world without plants is not worth living in - and not viable! Our silent fellow plant creatures shape the face of this earth, harvest the sun's energy and provide us with food and oxygen. In doing so, they use every conceivable "trick" by aligning themselves with the sun and gravity and arranging their flowers and leaves as cleverly as possible. In the process, amazing symmetries and patterns come into being that tell of mathematical relationships. Some particularly beautiful examples of floral astronomy and mathematics will be presented in this lecture.
![Band structure of 2D semimetal based on HgTe quantum well. Experimental points are obtained from the analysis of the cyclotron resonance in the quasi-classical approximation. Solid lines are predictions of the kp theory with no free parameters. Splitting of the conduction (e1,2) and valence (h1) band is due to the quantum confinement. [J. Gospodaric, AP, et al., PRB 104, 115307].](/storages/physik/_processed_/b/5/csm_Kolloquium_Pimenov_0fa7761647.png)





