Unless explicitly stated a piece of software is copyrighted

[ariyamsunavastin]

Hello
As per the title, I found a problem with the license:

https://trixi-framework.github.io/HOHQMesh/license/

It is related to the pieces of external software reported at the end of the page.

• b3hs_hash_key_jenkins
• fmin
• spline
• seval

Unless the author itself waives his own rights in public domain favor with something like this, for instance:

https://www.cs.cmu.edu/afs/cs/project/quake/public/code/predicates.c

copyright laws applies. We would like to make things easier, but that doesn't change laws.

So a substitution or a (careful) rewrite of those four files would be in order, to make this interesting library compliant with your license of choice, MIT.
Until that, it is MIT for your code and copyright of respective authors for the above mentioned files.
HTH