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3h
comment Example for $(a,b,n,k) \in \mathbb{N}^4$, $r(a^n) = b^k$, where $r$ is the reverse of a number
See also oeis.org/A035123 "Roots of 'non-palindromic squares remaining square when written backwards'." 12, 13, 21, 31, 33, 99, 102, 103, 112, 113, 122,.... and the less interesting list at oeis.org/A035125, Roots of 'non-palindromic cubes remaining cubic when written backwards', where all 24 entries listed have only zeros and ones for digits.
1d
comment My supervisor blocks me from submitting my co-authored paper to a journal
But there is no mathematics in your question. Please, try the academia site – the question is wildly off-topic here at m.se. Alternatively, is there someone else in your department you can talk to?
1d
comment Out of curiosity, which numbers are necessary?
Do you want to have circumferences of ellipses? Then you'll need all the numbers that come up as elliptic integrals.
2d
comment Trace 0 and Norm 1 elements in Finite fields
You should edit your question, then, so it asks what you actually want to ask.
2d
comment Trace 0 and Norm 1 elements in Finite fields
Are you still here?
2d
comment Is $G/N$ isomorphic to $\mathbb R ?$
Are you still here?
2d
comment Proof that theorem M- is center of gravity
Center of gravity of what?
Apr
27
comment Is there an algebraic solution for this rootfinding problem?
Depends on $\gamma$. Yes for $\gamma=0$, $\gamma=1$, $\gamma=2$, $\gamma=3$, $\gamma=4$, $\gamma=1/2$, a few others, false for most values of $\gamma$.
Apr
27
comment Proof that theorem M- is center of gravity
What are $A$, $B$, $C$, and $M$? What is the question? Why the pythagorean-triples tag? This is about as bad as it's possible for a question to get!
Apr
27
comment Trace 0 and Norm 1 elements in Finite fields
Are you asking whether there always exists such an element? There certainly can exist such an element – if $q$ is 3 mod 4, and $\ell=2$, and $\alpha$ satisfies $x^2+1=0$. But if $q$ is 1 mod 4, and $\ell=2$, then there can't be any such element.
Apr
27
comment How many pairs $ (a,b)$ of integers such that , $a^2b^2=4a^5+b^3 $
@Young, is that an ongoing competition?
Apr
27
comment Is $G/N$ isomorphic to $\mathbb R ?$
What made you decide $N$ is not isomorphic to {the reals under addition}? Did you try multiplying two elements of $N$ to see what you get?
Apr
27
comment What is the maximum number of triangles in a planar graph with n vertices?
Have you gotten home from work yet?
Apr
27
comment The equation $x^3 + y^3 = z^3$ has no integer solutions - A short proof
Currently 21 upvotes and 18 downvotes. Must be one of the more divisive answers on m.se.
Apr
27
comment How do display matrix A,b,c when using AMPL for a Linear Optimization's problem?
This seems to be a coding problem, off-topic here on math.stackexchange.
Apr
27
comment How many pairs $ (a,b)$ of integers such that , $a^2b^2=4a^5+b^3 $
Can you tell us where you came across this problem?
Apr
27
comment Vectors and tractors
Not a good idea to just dump a problem here, with no indication of what you know about the problem, where it comes from, how far you got on it, where you got stuck, and so on.
Apr
27
comment Two normal operators are similar if and only if they are unitarily similar
@Martin, the question has been reopened.
Apr
27
comment Galois group of a quartic which is also a quadratic in $x^2$
And as @Ryan notes in a comment, even if $f(x)=g(x^2)$, the degree of $E_f$ over $E_g$ may be 4, not 2.
Apr
27
comment Find a polynomial such that f(T)=T* of a given linear operator
Good. If you get the problem worked out, I encourage you to write it up and post an answer.