Abstract Heresies

In Common Lisp, there are a lot of macros that begin with the word “ with- ”. These typically wrap a body of code, and establish a cont...

I didn’t expect anyone would be interested, so I just pushed the code that I had with little thought about anyone trying to use it. It turn...

I decided to learn about games, so I followed along with a tutorial by Kaarin Gaming . His tutorial was written in Java, but of course I ...

A bilinear fractional transformation (BiLFT) is a two-argument function of the form (lambda (x y) (/ (+ (* A x y) (* B x) (* C y) D) ...

If you like functional composition, you’ll like linear fractional transformations (LFTs). They behave very nicely when you compose them...

If we compose a function F(x) with itself, we get F(F(x)) or F∘F. If we compose it again, we get F(F(F(x))) or F∘F∘F. Rather than writi...

Looking for a fun weekend project? Allow me to suggest linear fractional transformations . A linear fractional transformation (LFT), also...