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Feb
8
accepted Find the number of ways to obtain a total of $15$ points by throwing $4$ different dice?
Feb
8
asked Find the number of ways to obtain a total of $15$ points by throwing $4$ different dice?
Feb
7
accepted What is the need of exponential generating functions on combinatorial problems?
Feb
7
asked Why do I need the subtraction for this generating function?
Feb
7
asked What is the connection with $g=1+\frac{1}{g}$ and $G_n= 1+\frac{1}{G_{n-1}}$?
Feb
7
comment What is the need of exponential generating functions on combinatorial problems?
So I suppose that the EGF exist as an analytic object (my professor told me that it's radius of convergence is bigger than the radius of convergence of OGF's), what does these analytic properties tell about the EGF? Does it always tell something fixed or it indicates something different on different applications?
Feb
5
asked What is so enlightening in the Ferrers diagrams?
Feb
5
asked How to obtain the chromatic polynomial of $C_5$?
Feb
4
asked What is the need of exponential generating functions on combinatorial problems?
Feb
4
asked Is it possible to check if this function is associative without checking all the cases?
Feb
1
accepted What is $\langle I\rangle$ in this text?
Feb
1
comment What is $\langle I\rangle$ in this text?
Thanks. I didn't think I had to go too much in the beginning to see that. I looked in the previous chapter various times, but didn't find it. Ah, I also didn't mention the book because there are no PDF's of them online (at least I didn't find it). Did you use Amazon's Look Inside?
Jan
30
comment What is $\langle I\rangle$ in this text?
@anorton Ronald Gould: Graph Theory.
Jan
30
asked What is $\langle I\rangle$ in this text?
Jan
28
comment Why does list coloring provides a more general setting to discuss the chromatic number?
The list colorings.
Jan
28
comment Why does list coloring provides a more general setting to discuss the chromatic number?
But are they always isomorphic one to each other?
Jan
28
asked Why does list coloring provides a more general setting to discuss the chromatic number?
Jan
28
comment Confusion about Hajós construction?
Thanks. I also read a bit of the Handbook of Graph Theory and discovered that the construction doesn't have to be made on all edges/vertices. It seems one could choose a limited ammount of them to process.
Jan
28
accepted Confusion about Hajós construction?
Jan
27
comment What is this binding function?
No, it was my mistake. I thought I saw it on the book.