Linguistics 726: Mathematical Linguistics

Homework 4 to Lecture 4.1: due Sep 26, 2006 (this was also HW 4 in 2004 and 2001)

Algebra. Ex 1 involving homomorphism from Parity to N; Ex 2 about symmetries of the square, Ex 3 - answer questions scattered through the handout, and optionally think about what A⁰ should be. Instructor's index and several solutions posted below.

Instructors' Index (.pdf)
Instructors' Note on Homomorphisms (.pdf)
Student Solution 1: Exercise 2 (.pdf)
Student Solution 2: Exercise 1, 2; Handout questions 3.1 - 3.5 (.pdf)
Student Solution 3: Exercise 1 (.pdf)
Student Solution 4: Excercise 1, 2, and  A⁰ (.pdf) 
Student Solution 5 (new 2006): Exercises 1,2 (.pdf)
On A⁰ (.pdf)
On A⁰ - Interesting wrong answer (.pdf)
On closure of the null set (.pdf)