This is the website of R.R. van Hassel.

photograph during Corona period


Instructions of 2DL60 (2020-2021, Q1):
pdf-files 2DL60

mp4- and pdf-files of Complex Analysis (2020-2021, Q1);
mp4 and pdf-flies CA

The .xoj files can be looked wih the free program: xournal
Then you can write something or change something.
There is also a Windows-version of that free program.
There is also another version: xournalpp
just search on internet with: xournalpp windows

Video-Files(.mp4) 2DL40

Instruction of 2WAF0 (2020-2021), Q2):
pdf-files and otherwise