267,799 reputation
25268548
bio website
location Cleveland Heights, OH
age 66
visits member for 3 years, 7 months
seen 14 mins ago

Professor emeritus at Cleveland State University. I’m a set-theoretic and general topologist with an interest in combinatorics. I’m also interested in linguistics, especially historical linguistics.


17h
revised Infinity in “Extended Natural Numbers”
added 353 characters in body
1d
revised Points Distributed evenly around a circle: how many points are in each region?
Improved MathJax.
1d
revised Question of sequence
edited tags
1d
revised Number of permutations of $[n]$ with a multiple of $n$ inversions
Better title.
2d
revised Can the direction of failing distributivity on ordinals be turned into an inequality?
Improved MathJax, formatting.
2d
revised How to prove the closure $\bigcup_{n\ge 1} F_{n}$ is totally bounded and closed
Fixed poor MathJax, improved formatting.
2d
revised How to prove the closure $\bigcup_{n\ge 1} F_{n}$ is totally bounded and closed
Prettied it up a little.
2d
revised Understanding proof of Hartogs’ Theorem on Set Theory
Stupid typo.
2d
revised Understanding proof of Hartogs’ Theorem on Set Theory
His name is Hartogs, not Hartog.
2d
revised Series with floor function - convergent?
Fixed MathJax.
2d
revised Divisibility of binomial coefficients
Improved formatting.
2d
revised If $p$ and $q = 2p + 1$ are both odd primes, show that $-4$ and $2(-1)^{(1/2)(p-1)}$ are both primitive roots modulo $q$.
edited title
2d
revised Complete Proof of Lindelof Theorem
Inserted image.
Jan
23
revised Indexed family by two indexes
MathJax and a little copyediting.
Jan
23
revised How to approach this proof problem, what proof to use, what assumption to use?
added 369 characters in body
Jan
23
revised Locally Compact Spaces: Nonexamples
Corrected oversight in original.
Jan
22
revised Injections from all ordinals into a set $X$
added 612 characters in body
Jan
22
revised Solve $\frac{x}{m}=\lfloor{x^{2/3}}\rfloor+ \lfloor{x^{1/2}}\rfloor+1$
More readable MathJax.
Jan
22
revised Solving $\int_7^9 \frac{2}{9 + 16x^2}\,dx$ without using trigonometric substitution?
added 298 characters in body
Jan
21
revised Show any two matrices that commute with M also commute with eachother
MathJax, standard punctuation.