2,647 reputation
1134
bio website thoppe.github.io
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visits member for 4 years, 4 months
seen 2 hours ago

Nov
14
asked Graph invariants for rooted trees
Nov
11
revised Tree recursive question: number of nodes and relationship with children
Removed unnecessary intro
Oct
22
asked Mapping graphs to themselves, e.g. the meta-graph
Oct
7
asked Decomposing a matrix into a finite set of elements
Oct
3
accepted Integers (strictly) between 0 and 1 form the basis of transcendental number theory?
Oct
2
asked Integers (strictly) between 0 and 1 form the basis of transcendental number theory?
Sep
30
awarded  Explainer
Sep
24
awarded  Autobiographer
Sep
18
awarded  Popular Question
Sep
12
comment Bitcoin math problem example
Also bitcoin.stackexchange.com
Sep
3
comment Is there anything special about a graph with the golden ratio in its spectrum?
Can provide a reference for "experimental evidence indicates that most graphs have characteristic polynomial irreducible over the rationals"?
Sep
3
accepted Is there anything special about a graph with the golden ratio in its spectrum?
Sep
1
comment Is there anything special about a graph with the golden ratio in its spectrum?
Right, that explains why they are relatively common. I was interested if the graphs themselves have any special symmetry. For example, none of the graphs seem particularly dense (in that they are planar or nearly so). These seems to be true for the graphs of order 7 that I examined as well.
Sep
1
asked Is there anything special about a graph with the golden ratio in its spectrum?
Aug
7
revised How many distinct chromatic polynomials are there for simple connected graphs?
Clarified the question
Aug
7
comment How many distinct chromatic polynomials are there for simple connected graphs?
@jp26 I am looking for the number of unique polynomials not the number of unique graphs. I just realized that the title and the text contradict each other. I'll make an edit to correct this. However, the other question is very interesting too and worth asking in it's own right.
Aug
6
comment How many distinct chromatic polynomials are there for simple connected graphs?
@jp26 I agree! I was only waiting a few days before I accepted the answer to see if someone could come up with a reference with a longer set of terms. Independently I've computed this up to n=10 (without using Sage), so I'll post it as an answer if no one else does.
Aug
4
asked How many distinct chromatic polynomials are there for simple connected graphs?
Aug
1
awarded  Nice Question
Jul
23
awarded  Yearling