Category "sicp"

SICP Exercise 2.5 - How if it needs a modification?

I'm currently reading the SICP, and working on Exercise 2.5 : Exercise 2.5. Show that we can represent pairs of nonnegative integers using only numbers and ari

SICP exercise 3.20 - understand the envrionmental diagram (missing binding in my diagram)

There was a question regarding this exercise in this forum, but it dose not answer my specific question. This exercise asks to draw the environmental diagrams f