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Jun
30
awarded  Yearling
Jun
30
awarded  Yearling
Jun
30
awarded  Yearling
Jun
30
awarded  Yearling
Apr
11
awarded  Scholar
Apr
11
accepted Combinatorial interpretation of Delannoy numbers formula
Apr
9
awarded  Student
Apr
9
asked Combinatorial interpretation of Delannoy numbers formula
Feb
8
answered PDE diffusion problem
Feb
7
comment Can the natural numbers be uncountable?
Well, at least your proof is correct to show that $p$-adic integers are uncountable.
Nov
21
awarded  Enthusiast
Nov
21
awarded  Nice Answer
Nov
17
answered Mathematical formula to generate a curved Chinese-style roof
Nov
16
answered Prove if $a>0, b>0$, $P(X\cdot Y\le b)\ge P(X\le b/a)-P(Y>a)$, where $X,Y$ random variables?
Nov
15
revised Rigorous proof of a simple fact dealing with event space in probability theory
added details on induction
Nov
15
answered Rigorous proof of a simple fact dealing with event space in probability theory
Nov
11
answered Probability about three independent exponential random variables
Nov
9
awarded  Commentator
Nov
9
comment Getting exactly $n$ points from coin tossing
You can even generalize directly for a biased coin, and get, where $p$ is the probability of obtaining tail (of scoring two points), $P_n=\frac{1}{1+p}\left(1-(-p)^{n+1}\right)$.
Oct
31
revised If $V_1=\ker(P)$, $V_2=\ker(I-P)$ and $V=V_1 \oplus V_2$ then prove $P^2=P$?
added complete answer