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1d
comment Is my work correct? (Easy problem, confidence intervals)
Crossposted on stats: stats.stackexchange.com/q/169900/56303
1d
comment What does the notation $11\mid a^2$ mean?
@SilviaGhinassi It would actually be considered bad form and most likely ineffective to comment on that post. For one thing, the answer in question was written years ago and by a user who has not returned. No one will read the comment. Secondly, this is a disjoint question from before and is unrelated to the original topic of proving the irrationality of $\sqrt {11} $. Thus, it should be a separate question. While this might be a duplicate (but I'm on my phone right now so it's hard to check), it should not have been a comment. That's not what comments are for.
Sep
1
comment 1, 5, 9, 13, 17, 21,…
@Joshua You're confusing modular congruence with the binary modulus operation. The usage above is designating modular congruence.
Aug
25
revised Find the least positive residue of $10^{515}\pmod 7$.
Changed title to get this off the hot questions list.
Aug
20
revised Double integral problem: $\int_0^\pi\int_x^\pi \frac{\sin y}{y} dy\, dx$
Title edit
Aug
20
comment Proving that all integers are even or odd
@JoeBlow It one of the Peano Axioms. As such, in Peano arithmetic, it cannot be false by assertion. For alternative arithmetic definitions and impact on induction, consider this question.
Aug
20
comment Which one of the following versions of Bayes' theorem is correct?
They're equivalent, based on the law of total probability.
Aug
17
awarded  Popular Question
Aug
15
reviewed Leave Open Determining if a function is one-to-one or onto.
Aug
15
reviewed Close Collision of Inelastic ball above the ground
Aug
14
reviewed Close Is this map proof that Four Color Theorem is wrong, or I'm missing something?
Aug
14
comment Is this map proof that Four Color Theorem is wrong, or I'm missing something?
I'm voting to close this question as off-topic because it is attempting to find a counterexample for a well-known theorem.
Aug
14
reviewed Close G is finite group. Need to proof that exists natural k that $g^k = e$
Aug
14
reviewed Close Smallest number that is divisible by $7$ and leaves a remainder of of $1$ when divided by $2, 3, 4, 5,$ or $6$
Aug
14
comment Tough integral with exp
Welcome to math.SE: since you are new, I wanted to let you know a few things about the site. In order to get the best possible answers, it is helpful if you say in what context you encountered the problem, and what your thoughts on it are; this will prevent people from telling you things you already know, and help them give their answers at the right level.
Aug
14
reviewed Close Solve inequality with primes
Aug
14
comment Solve inequality with primes
Welcome to math.SE: since you are new, I wanted to let you know a few things about the site. In order to get the best possible answers, it is helpful if you say in what context you encountered the problem, and what your thoughts on it are; this will prevent people from telling you things you already know, and help them give their answers at the right level. Also, many find the use of imperative ("Prove", "Solve", etc.) to be rude when asking for help; please consider rewriting your post.
Aug
14
reviewed Leave Open Standard properties of trigonemetric functions
Aug
14
comment Can $S_n$ be embedded in $GL_{n-1}(\mathbb Z)$ ?
Your question is phrased as an isolated problem, without any further information or context. This does not match many users' quality standards, so it may attract downvotes, or be put on hold. To prevent that, please edit the question. This will help you recognise and resolve the issues. Concretely: please provide context, and include your work and thoughts on the problem. These changes can help in formulating more appropriate answers.