Douglas S. Stones
Reputation
14,619
Top tag
Next privilege 15,000 Rep.
Protect questions
 Sep12 reviewed Leave Open A bijection of Cartesian products Sep10 reviewed Leave Open how do you call a function that breaks down on y? Sep10 reviewed Close Level of math required to start research? Sep10 reviewed Leave Closed Is the $\sum\sin(n)/n$ convergent or divergent? Sep10 reviewed Leave Closed Limit of the nested radical $\sqrt{7+\sqrt{7+\sqrt{7+\cdots}}}$ Sep10 reviewed Leave Closed Why is $dy dx = r dr d \theta$ Sep10 reviewed Leave Closed How to find the equation of a graph with given coordinates? Sep10 reviewed Leave Closed If g(f(x)) is one-to-one (injective) show f(x) is also one-to-one (given that…) Sep10 reviewed Leave Closed Is square root of an integer, either an integer or an irrational number, but never (non-integer) rational? Sep10 reviewed Leave Closed difference between $f(x)=0$ and $y=f(x)$. Sep10 reviewed Leave Closed Weird E letter? (sigma) Sep10 reviewed Leave Closed Sum of n consecutive numbers Sep10 reviewed Leave Closed Puzzle - where did the extra dollar come from? Sep10 reviewed Leave Closed How come the number $N!$ can terminate in exactly $1,2,3,4,$ or $6$ zeroes but never $5$ zeroes? Sep10 reviewed Leave Closed Best Fake Proofs? (A M.SE April Fools Day collection) Sep10 reviewed Leave Closed Which one is preferred: $r2^m$ or $2^m r$? Sep10 reviewed Leave Closed A simple yet confusing puzzle - Fake money involved! Sep10 reviewed Leave Closed The union of kernels is a proper subspace Sep10 reviewed Reopen Why is it important that a basis be orthonormal? Sep10 reviewed Leave Closed What is the most number of regions that 9 lines can cut the plane into