Ultra-metric spaces matter for data science where hierarchical concepts should be preserved and symmetries need to be exploited. Slides for the introduction talk on p-adic numbers are at [slideshare id=148971289&doc=p-adic-190606080759]
The navigation software OSMand provides online and offline navigation. Their open-source software depends on openstreetmap (OSM) a volunteered geographic data initiative. Map data can be added by any person using different software tools. In some cities mapping parties are held to increase data quality of OSM and to teach people the fundamentals of geographic information […]