796 reputation
423
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location Zurich, Switzerland
age
visits member for 3 years
seen Dec 20 '14 at 6:51

Oct
26
comment How is $dx \over dy$ different from $\partial x \over \partial y$?
So what does $dx \over dz_1$ mean? Or is it undefined? If it is undefined why not just use the same notation?
Oct
26
asked How is $dx \over dy$ different from $\partial x \over \partial y$?
Oct
16
asked Any simplification of $\log_e{(1+e^x)}?$
Oct
15
answered Generously Feasible?
Oct
15
comment Generously Feasible?
Can you provide the link? It doesn't show in my search results?
Oct
15
asked Generously Feasible?
Sep
29
accepted Combinations of resistor networks?
Sep
25
revised Combinations of resistor networks?
added 97 characters in body
Sep
25
asked Combinations of resistor networks?
Sep
21
comment Counting Hexagons in Triangle Grid Recurrence?
@BrianM.Scott: What was your technique?
Sep
17
awarded  Benefactor
Sep
17
accepted Counting Hexagons in Triangle Grid Recurrence?
Sep
17
comment Counting Hexagons in Triangle Grid Recurrence?
This is correct, thanks. I was fooled by the N=4 case into thinking that all hexagons that touch all three sides must have one side of n-2, which is true for N=4 but not true for higher values of N. For example for N=5 we can have a hexagon that results from chopping off triangles of side 2 removed from each corner of the grid.
Sep
16
revised Counting Hexagons in Triangle Grid Recurrence?
added 114 characters in body
Sep
16
awarded  Promoter
Sep
14
asked Counting Hexagons in Triangle Grid Recurrence?
Sep
8
accepted N unlabelled balls in M labeled buckets
Sep
8
comment N unlabelled balls in M labeled buckets
This proves it incorrect, however I still don't see what went wrong in my reasoning. The number of ways to put N labelled balls in M labelled buckets is $M^N$ correct? So why can't I just divide by the number of permutations of N balls to arrive at the unlabelled ball case?
Sep
8
comment N unlabelled balls in M labeled buckets
Why isn't my expression correct?
Sep
8
asked N unlabelled balls in M labeled buckets