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Squirtle, squirtle......


2d
comment prove that $p^2-1$ is divisible by $24$ if $p$ is a prime greater than $3$
What have you tried?
2d
comment problem book suggetion
There are a few that are great for physics and quantum chemistry? Does this interest you at all? I found this subject "came alive" when I had concrete examples in mind.
Jan
28
comment Solving equation please help
What does Plssssssssssss mean?
Jan
28
comment Using absolute value to solve an equation.
More explicitly, $a=\frac{4}{5}+5 = \frac{4}{5}+\frac{25}{5}=\frac{29}{5}$ and $a=5-\frac{4}{5} = \frac{25}{5}-\frac{4}{5}=\frac{21}{5}$
Jan
28
revised Using absolute value to solve an equation.
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Jan
28
answered Using absolute value to solve an equation.
Jan
28
reviewed Reject What does it mean for a function to increase along a curve?
Jan
28
reviewed Approve $\epsilon$-$\delta$ proof of a sinc limit in Complex variables
Jan
27
revised Let $G$ be a group and $u \in G$ be a fixed element. By the following, prove that $(G,\bullet)$ is a group.
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Jan
27
comment Let $G$ be a group and $u \in G$ be a fixed element. By the following, prove that $(G,\bullet)$ is a group.
Oh yeah, thanks. My bad
Jan
27
revised Let $G$ be a group and $u \in G$ be a fixed element. By the following, prove that $(G,\bullet)$ is a group.
edited title
Jan
27
comment Let $G$ be a group and $u \in G$ be a fixed element. By the following, prove that $(G,\bullet)$ is a group.
Well, if we require that $u$ is the identity, then this is correct; otherwise, my solution works. It wasn't stated in the question of the problem so I assumed the identity was the same in both cases. Though it seems a bit strange that $u$ is just "some" element in the opening line, then later called the identity.
Jan
27
answered Let $G$ be a group and $u \in G$ be a fixed element. By the following, prove that $(G,\bullet)$ is a group.
Jan
27
comment Finding a linear transformation such that $T^{3} = T $
then you need to ask your questions better and more clearly. If you can't ask your question properly, you probably haven't put enough time in thinking about the problem anyway.
Jan
25
reviewed Approve A walkthrough of how to apply Eisenstein's criteria to show that a multivariate polynomial is irreductible.
Jan
24
comment $p\implies q = p'\vee q$ and duality
I like the example, thanks. +1
Jan
23
revised Construct a set of real numbers whose limit points comprise the set of integers $\mathbb{Z}$
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Jan
23
comment $p\implies q = p'\vee q$ and duality
I didn't downvote this answer. It was helpful although not at all what I was expecting, so I am waiting to see if I'll get any other responses. Kinda surprised the question got down voted too, some people ....
Jan
23
revised Prove that if $a<b$, then $-b<-a$
added 9 characters in body; edited body; edited body; added 3 characters in body
Jan
23
comment Books on convex sets?
Is this for optimization?