619 reputation
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visits member for 1 year, 8 months
seen Jan 10 at 22:35

Dec
18
answered Probability that an undirected graph has cycles
Dec
18
answered What's the rule for solving nested sums?
Dec
18
answered How to prove this sign of the derivative?
Dec
16
comment What are a list of helpful boolean identities for solving boolean functions?
they all boil down to the 3 operators. nothing drastic escaping your eye.
Dec
16
revised Number of triangles formed by $m$ lines
Corrected the lower bound on the formula.
Dec
16
comment Round trips on train
What did you add to your original answer in the edit Dan Christensen ?
Dec
16
answered Number of triangles formed by $m$ lines
Dec
16
answered Round trips on train
Dec
15
comment Bus stop independent events expected value
The buss arrivals seem to be independent from the time the family going to the stop. so, i don't see the point in the first son's argument.
Dec
15
comment Bus stop independent events expected value
Your first multi-line paragraph is unclear.
Dec
15
comment How to define the $0^0$?
My vote goes to this ans. as well.
Dec
15
comment The following recursive function defines a linear affine difference equation?
it is correct now.
Dec
15
comment combinatorics problem : How many different choice are there So that exactly 3 candidate get most vote.
is it an open vote-- is it known or does it matter who voted for who ?
Dec
15
awarded  Citizen Patrol
Dec
15
comment Probabilities of flight route combinations
i fancied your original answer before the edit.
Dec
15
revised Probabilities of flight route combinations
added 120 characters in body
Dec
15
answered Probabilities of flight route combinations
Dec
15
comment How to solve $2{x_{1}}+2{x_{2}}+{x_{3}}+{x_{4}}={12}$
+28-20 for (3,6). Should add up to 140.
Dec
15
comment Equations Modulo a Prime p
are those all squares
Dec
15
answered easy activity to train finding pattern ability?