some notes:

funktionspostfach

ToDo: Test this method: Delete virtual function from a derived class

This is because the relational operators have higher precedence than the logical operators.

https://nathanj.github.io/gitguide/tour.html

std::cout << "double_val: " << std::setprecision(30)

std::for_each for m vectors

https://arne-mertz.de/2017/01/decltype-declval/

https://godbolt.org/z/zxWmqt

https://godbolt.org/z/YivYb5

https://godbolt.org/z/oEZ4G4

https://stackoverflow.com/a/30627005/11539646

http://maintainablecode.logdown.com/posts/159916-memcpy-memmove-and-memset-are-deprecated

I am looking for a generic implementation for the operator<< that returns a stringstream using concepts

Here I found the following generic implementation of the operator<< that returns a stringstream...

A sequence of points in 2d space is given by (0,y0),(1,y1),(2,y2)...,(n,yn). In oder to understand the question we start with the following definition: Definition of a touching line: A touching line goes throu the points A and B (both members of the point sequense) and is defined by mx+b it has the property For all Points (i,yi) other than A and B the following holds: yi > mi+b There are situations where there is no unique solution for the problem.