Brian M. Scott
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# 311,934 Reputation

275 yesterday
 +75 06:35 7 events Closed-form expression for $\binom{n}{1}+3\binom{n}{3}+5\binom{n}{5}+\cdots$ +45 20:29 4 events Devising a method to arrive at a square only being able to move right and up +35 06:07 3 events Summatory problem | Ordinary least square estimator +25 19:49 2 events Probability with $n$ successes before $m$ failures +25 05:06 2 events Show that the function $p(k)=k+(-1)^kc$ is a permutation of the set of all integers +12 20:27 2 events For a finite character set $\Sigma$, what would be a formal proof that $\Sigma^{+} = \Sigma^{*}\Sigma$? +10 21:01 2 events How to prove that the subsets of $\mathbb{N}$ that don't contain arithmetic progressions of some length form closed sets of a topology? +10 19:22 upvote Cantor's Diagonalization (Countable Languages) +10 17:56 upvote Finding the number of non-neg integer solutions? +10 02:41 upvote Summing the binomial pmf over $n$ +10 02:02 upvote How to calculate the number of possible connected simple graphs with $n$ labelled vertices +10 00:50 upvote Every year, there is a contest… 23:20 upvote Looking for a clarification of the Suslin $\mathcal{A}$-Operation with a (finite) example -2 13:53 downvote How many ways are there to choose 10 objects from 6 distinct types when…
290 2 days ago
 +70 03:01 7 events How to find the value of $(a+b+c)(a+b+d)(a+c+d)(b+c+d)$ from the following equation? +67 14:16 15 events Every year, there is a contest… +35 01:37 3 events Cantor's Theorem with Posets +25 06:47 4 events Average length of a cycle in a n-permutation +20 02:46 2 events What do you call a space whose only compact sets are finite? +20 / -2 04:31 3 events Is it possible to find the criminal with graph-theoretic methods? +15 23:53 2 events How to find $\frac{a+b+c}x$? +15 23:20 2 events Proving $F . G$ is the greatest lower bound +15 18:09 2 events Why is a convex subspace the requirement for equivalence beween subspace and order topologies? +10 00:05 upvote Why are logarithms not defined for 0 and negatives? 22:03 upvote (Alternate Answer To) How Many Binary Strings Of At most Length $6$ have no consecutive zeros 19:52 upvote In Group theory proofs what is meant by “well defined” 19:18 upvote Example of a function continuous at only one point. 17:45 upvote How to Prove : $\frac{2}{(n+2)!}\sum_{k=0}^n(-1)^k\binom{n}{k}(n-k)^{n+2}=\frac{n(3n+1)}{12}$ 17:20 upvote Is there a way to write this expression differently: $\arctan 1/(1+n+n^2)$? 13:23 upvote generating function for a power sequence 13:22 upvote Is there a monotonic function discontinuous over some dense set? 13:11 upvote Question about generating functions 12:30 upvote How to calculate the number of possible connected simple graphs with $n$ labelled vertices 08:48 upvote Open/Closed value of unions of Open/Close intervals. 07:43 upvote Topological spaces admitting an averaging function
230 Aug 25
 +50 17:58 5 events Using generating functions find the sum $1^3 + 2^3 + 3^3 +\dotsb+ n^3$ +40 22:26 5 events Topological spaces admitting an averaging function +20 11:13 2 events Is a particular countable subset of the Cantor set Polish? +15 23:49 4 events Let $p,q$ be real polynomials. Let $F: \Bbb R \to \Bbb R$ be differentiable, then $p=q$. +15 08:35 accept A-noncompact, Does there **always** exist a continuous function $f: A \to \mathbb R$ which is bounded but does not assume extreme values? +10 18:33 upvote Finding the inverse of a matrix by elementary transformations. +10 14:37 upvote Why you need to divide to calc conditional probability +10 14:02 upvote Difference between NFA and DFA +10 13:09 upvote Given $f(x)$ and $g(x)$, find the range and domain of $fg(x)$ +10 12:09 upvote probability that 5 square lie along a diagonal line +10 10:31 upvote Whether $(0,1)$ and $(0,1]$ are homeomorphic +10 08:19 upvote Fractions in Ancient Egypt +10 04:40 upvote Does there exist a function $f:[0,1] \to[0,1]$ such its graph is dense in $[0,1]\times[0,1]$? +10 02:45 upvote How prove this$\sum_{i=0}^{m-1}\binom{n-1+i}{i}x^ny^i+\sum_{j=0}^{n-1}\binom{m-1+j}{j}x^my^j=1$ 23:49 2 events Is it possible to find the criminal with graph-theoretic methods? 22:44 upvote Solving a weird recurrence relation using exponential generating functions and differential equations
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