hardmath

Knoxville, TN

uclue.com

Age: 62

Enjoys programming in Prolog.

Richard O'Keefe: "Prolog is an efficient programming language because it is a very stupid theorem prover."

When I cross the street, I look both ways: up and dn.

3h
comment Fitting a rectangle to a point set
@FooBar: Would you care to post a sample data set of a few dozen points for the sake of illustration?
3h
reviewed Reviewed Win/Lose ratios and selection strategies
3h
comment Win/Lose ratios and selection strategies
In some situations there can be a seemingly paradoxical comparison, that deck $A$ beats deck $B$ more than half the time, deck $B$ beats deck $C$ more than half the time, and deck $C$ beats deck $A$ more than half the time. Thus no "function" can consistently rank which deck is "best". This can be shown in a simplified example replacing the playing decks with dice, high roll wins.
3h
reviewed Looks Good chain rule conditional entropy
3h
revised Prove that there exists infinitely many primes of Digital root $2,5$ or $8$
added some notes on Dirichlet's theorem on primes in arithmetic progressions
4h
comment Infinitely many primes of the form $4n+3$
@calmyoursenses: Indeed, but if a positive integer $d$ divides positive integer $n$, then necessarily $d \le n$. Perhaps you'd already noticed this?
5h
answered Prove that there exists infinitely many primes of Digital root $2,5$ or $8$
12h
reviewed Reopen Prove that a function is Riemann integrable directly, using $\epsilon-P$
12h
reviewed Leave Closed Limit of this monster function
12h
revised What does three bars and "def" mean in a partial derivate problem?
added remarks about the book's context where the notation appears
13h
answered Can we say that $\det(A+B) = \det(A) + \det(B) +\operatorname{tr}(A) \operatorname{tr}(B) - \operatorname{tr}(AB)$.
14h
reviewed Leave Open Expressing $z\in G$ as $z=gh^2$ where $g$ is a $2$-element and $|h|$ is odd
14h
reviewed Leave Open an edge coloring of $k_{16}$ with no monochromatic triangle
14h
reviewed Close Matrix shear transformations
14h
comment Matrix shear transformations
Do you have only a two-dimensional (plane) transformation in mind? Such a briefly worded Question asks the Reader to speculate about the context in which you ask.
15h
comment How to left-adjust display-mode MathJax. Or is it not feasible?
What would make display-mode preferable to math-mode at the beginning of a line/paragraph?
15h
comment What are the common solutions of $x^2+y=31$ and $y^2+x=41$?
This does not provide an answer to the question. To critique or request clarification from an author, leave a comment below their post - you can always comment on your own posts, and once you have sufficient reputation you will be able to comment on any post. - [From Review](/review/low-quality-posts/570710)
15h
reviewed Close unsure how the 1/2 gets in this problem
15h
revised Does every non-empty quasigroup have a left or right identity?
edited tags
16h
revised Does every non-empty quasigroup have a left or right identity?
used array environment to format quasigroup multiplication table
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