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Apr
15
reviewed Close Show DLO + $\{ \phi : \phi = c_o < c_1 < \ldots \}$ has three models up to isomorphism
Apr
15
reviewed Close What are some good problem solving techniques for Math Olympiad style tests?
Apr
2
reviewed Close In “The Art of Mathematics” by Béla Bollobás, what are some good problems for someone who has only worked through calculus/linear algebra/probability?
Apr
2
reviewed Close StackEgg optimal algorithm
Apr
2
reviewed Leave Open How can I find the closed form of this recursive relationship: $a_{n}=(a_{n-1})^2+a_{n-1},a_{0}=1$
Apr
2
comment How can I find the closed form of this recursive relationship: $a_{n}=(a_{n-1})^2+a_{n-1},a_{0}=1$
Knuth's comment in OEIS that "Using the methods of Aho and Sloane, Fibonacci Quarterly 11 (1973), 429-437, it is easy to show that $a_n$ is the integer just a tiny bit below the real number $\theta^{2^n}-\frac12$, where $\theta \approx 1.597910218$ is the exponential of the rapidly convergent series $\ln\frac32+\sum_{n \ge 0} \ln(1+(2a_n+1)^{-2})$" gives you a starting point.
Apr
2
reviewed Close Is the difference of two decreasing functions also decreasing?
Apr
2
reviewed Leave Open Calculating the modulo of a p / q ( i.e., ( (p / q) % M ) ) where q is divisible by p and q and p are very large numbers
Apr
2
reviewed Leave Open Prob. on Technique Of Counting
Apr
1
reviewed Close Nonsigular curve of degree $3$ in $\mathbb P^2$ over a field of characteristic $3$
Apr
1
reviewed Close 18 teams and you need to select correct order
Apr
1
reviewed Close Kernel of a dihedral group's homomorphism
Apr
1
reviewed Leave Open Probability of exactly k out of n events occuring
Apr
1
reviewed Close “If a group $G$ is cyclic, then it has no proper subgroups.” True or false?
Apr
1
reviewed Close Negative integers congruent modulo m
Apr
1
reviewed Close Strong law of large numbers with changing expected value
Apr
1
reviewed Leave Open Parametric representation of a plane cut of a sphere at y=5
Apr
1
reviewed Close Is the functional equation $f(x+y)=f(x)+f(y)$ on $\mathbb{R}_{+}$ solved only by linear functions?
Mar
31
reviewed Leave Open Relation between Hermite polynomials and Brownian motion (on martingale property)
Mar
31
reviewed Close How to solve a semilinear PDE numerically using COMSOL MULTIPHYSICS