# A fun variant of HW4 # 3

Can you find a region that has exactly domino tilings, where is the sequence of HW4 Problem 3?

# A fun variant of HW4 # 3

Can you find a region that has exactly domino tilings, where is the sequence of HW4 Problem 3?

# HW4 #3: Small correction

Emily and Hannah pointed out a small mistake in Problem 3b on HW 4. (Thank you!) The subindices are shifted by one. The correct recurrence should be: Thank

# HW4 #3: Small correction

Emily and Hannah pointed out a small mistake in Problem 3b on HW 4. (Thank you!) The subindices are shifted by one. The correct recurrence should be: Thank

# HW4 Q2a

If I’m not mistaken, p_0(x)=S(0,0)=0. But it seems like for the statement in (a) to be true for n=1,n=2 which I tried, p_0(x) should equal 1. Do you see what I am missing??

# HW4 Q2a

If I’m not mistaken, p_0(x)=S(0,0)=0. But it seems like for the statement in (a) to be true for n=1,n=2 which I tried, p_0(x) should equal 1. Do you see what I am missing??

# Lecture 12: Symbolic Method

SPOILER ALERT: This thread might give you hints to solve Homework 4 Problem 1. If you don’t want a hint (yet), stop reading! Today in class I discussed “The Symbolic Method” for ordinary generating functions, and I promised you some

# Lecture 12: Symbolic Method

SPOILER ALERT: This thread might give you hints to solve Homework 4 Problem 1. If you don’t want a hint (yet), stop reading! Today in class I discussed “The Symbolic Method” for ordinary generating functions, and I promised you some

# HW4 Q2b

Hello, I was wondering if in this question we are talking about the polinomial sequence p_n(x)=x^n or is there some other well known sequence of polynomials that satisfy (1)? (by the way, it doesn’t appear in the hw who (1)

# HW4 Q2b

Hello, I was wondering if in this question we are talking about the polinomial sequence p_n(x)=x^n or is there some other well known sequence of polynomials that satisfy (1)? (by the way, it doesn’t appear in the hw who (1)

# What is combinatorics?

Igor Pak collected opinions from many experts. Some of these are very interesting, and in HW 5 I ask you to react to them. Feel free to discuss them here if you’d like. They are at: http://tinyurl.com/c8nvcfq Today in class I

# What is combinatorics?

Igor Pak collected opinions from many experts. Some of these are very interesting, and in HW 5 I ask you to react to them. Feel free to discuss them here if you’d like. They are at: http://tinyurl.com/c8nvcfq Today in class I

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