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visits member for 2 years, 4 months
seen Dec 10 at 1:45

sponge


Dec
6
comment What is the relationship between the some of the first n natural numbers and the number of unique pairs in n+1
I don't understand this. I really tried. How does the number of pairwise segments connect to the sum of the numbers. Sorry for being dense.
Dec
6
asked What is the relationship between the some of the first n natural numbers and the number of unique pairs in n+1
Sep
24
awarded  Autobiographer
Aug
9
awarded  Yearling
Jul
2
awarded  Curious
Feb
13
awarded  Popular Question
Feb
5
awarded  Popular Question
Dec
15
awarded  Notable Question
Nov
24
accepted How many topological orderings exist for this graph?
Oct
18
comment How many topological orderings exist for this graph?
I posted the three edges of the graph. x--->y if there is an edge from x to y
Oct
18
asked How many topological orderings exist for this graph?
Oct
15
accepted Binomial formula when the probability is 1/2
Oct
15
comment Binomial formula when the probability is 1/2
ahh i see. Thanks!
Oct
13
accepted How is the formula for partition of a set derived.
Oct
13
asked How is the formula for partition of a set derived.
Oct
13
comment Binomial formula when the probability is 1/2
Can you elaborate? I don't understand this still. I do understand how the sum of all n choose k equals 2^n. That just ends up being the set of all subsets which has 2^n elements. What I don't understand is what the 1/2 probability has to do with deriving that formula.
Oct
1
asked How to count the number of adjacent pairs in a list?
Sep
27
asked Binomial formula when the probability is 1/2
Sep
26
accepted Dot product of vectors and projections
Sep
26
accepted Why do we need to learn integration techniques?