MJD

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bio website blog.plover.com
location Philadelphia, USA
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visits member for 1 year, 2 months
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I am Mark Dominus, an amateur.

I have a blog that often carries articles about mathematics.


498 Answers

newest activity votes
5
How is it that some forms of an equation can have a defined outcome while other forms of the same equation are undefined?
5
Lowest multiple of $n$ over a certain threshold, $y$.
4
How the the Identity in Church Numerals not the 'succ' function (ie. x + 1)
4
Intuitive/Visual proof that $(1+2+\cdots+n)^2=1^3+2^3+\cdots+n^3$
4
What does “8.5070592e+37” mean?
4
Suggest an Antique Math Book worth reading?
4
The Best of Dover Books (a.k.a the best cheap mathematical texts)
4
Is there a graphical way to represent limit ordinals up to $\omega_1$?
4
The sum of a square and twice a square
4
recursive maps and decimal representation
4
How do I write $\{3,6,11,18,27,38,…\}$ in set-builder notation?
4
Find Units in $\mathbb{Z}[\sqrt{n}]$
4
Can every transcendental number be expressed as an infinite continued fraction?
4
Permuting elements of a set around a circle
4
Symmetries of a graph
4
Mathematics problems for very young children?
4
IF a language L logspace reduces to SAT, does L
4
Why is the set of all real numbers uncountable?
4
Finding the ones digit for $2^{98}$
4
What's the probability that the next coin flip is heads?
4
Proving that $\mathbb{R^*}$ is not a cyclic group
4
Finding disjoint neighborhoods of two points in $\Bbb R$
4
divisibility and gcd
4
What is $\phi(k)$ in $\sum_{k=1..n} \phi(k)\lfloor n/k \rfloor^2$?
4
Group Theory - Proving $(a*b)^{-1} = (a^{-1}) * (b^{-1}) $
4
Find the limit without L'Hôpital's theorem
4
What is the Psi(x) variable binding operator?
4
Discontinuous functions that are continuous on every line in $\bf R^2$
4
An inequality of red and black balls
4
Homework question regarding inverse function with a cosine
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