Mark Fischler

Member for 9 years, 6 months
Last seen this week

Warrenville, IL

Summary

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41,552

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elementary-number-theory

99/100 score

47/20 answers

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74

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matrices

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Answers

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Score Activity Newest

41

Formula for the simple sequence 1, 2, 2, 3, 3, 4, 4, 5, 5, ...

Jan 31, 2016

33

If a coin toss is observed to come up as heads many times, does that affect the probability of the next toss?

Jul 18, 2016

33

Find some digits of $17!$

Feb 28, 2019

30

Why are irrational numbers such a big deal?

Jan 10, 2017

29

Are there continuous functions for which the epsilon-delta property doesn't hold?

Nov 7, 2016

Questions

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Score Activity Newest Views

50

Prove that $\sum_{n=1}^\infty \frac{n!}{n^n}$is irrational.

Mar 11, 2015

17

Near-Pythagorean triplets: What are the general solutions to $a^2+b^2=c^2-1$?

Aug 10, 2021

14

If $a+b+c = 3abc$ and $\frac17 \leq k \leq 7$ prove $ \frac1{ka+b}+\frac1{kb+c}+\frac1{kc+a} \leq \frac3{k+1} $

Mar 22, 2017

12

Number of distinct angles that can be formed on a square grid

Nov 21, 2014

11

Is there a clean non-contrived theorem that can only be proven by contradiction?

Jul 7, 2016

Tags

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probability

366

Score

231

posts

calculus

338

Score

219

posts

real-analysis

208

Score

137

posts

sequences-and-series

208

Score

124

posts

combinatorics

154

Score

109

posts

Reputation

+10

Why does infinite expected number of returns to the origin imply a random walk returns to the origin with probability 1?

+10

Stability of equilibrium of a nonlinear system of ODE's

+10

How to model a consecutive binary constraint?

+10

Is the nim sum just the disjunctive sum at a different "scale"?

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Nov 7, 2014
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Nov 5, 2019

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Jun 18, 2019
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Mar 12, 2015
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Apr 1, 2021

74

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combinatorics

Feb 10, 2017
matrices

Jun 9
probability

Nov 3, 2015

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