Hiya. I finally had some time to work on Husk again. I added support for infinite numbers (which arise when you divide by zero, so they can't be produced manually), and added default values for indexing, minimum and maximum on empty lists.

And I added a new built-in Ξ that merges sorted lists.

For example, numbers of the form p^s, where p is a prime and s is a square, can be computed with ΞIṪ^İ□İp