A Precise Definition of Knowledge - Knowledge Representation ...
Carey G. Butler
Mathematica®: A System for Doing Mathematics by Computer
Stephen Wolfram
Pessimism: Philosophy, Ethic, Spirit
Joshua Foa Dienstag
Curl Cheat Sheet
Seth Kenlon
Handbook of Mathematical Economics - Volume 1
Kenneth Joseph Arrow & Michael D. Intriligator
Christians, Gnostics and Philosophers in Late Antiquity
Mark Edwards