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53m
revised solve an equation involving fractional powers
edited tags
54m
comment Finding a curve - 1st order ode
As you say the $x$-axis is vertical, I take it you have $x$ as a function of $t$, in which case there's no room for a $y$ in your tangent line equation. Also, what is meant by "the radius vector of the tangency point"?
1h
comment A Conjecture on The Generalization of Quadratic Reciprocity Law
Are you still there, 170039?
1h
comment An equality in some extension field
Where do you get $r<n$? It's not in the statement of the question.
1h
comment An equality in some extension field
In the equality that you are trying to prove, if you let $x=\alpha_k$, then the left side is $\alpha_k^r$, and, by the calculation I gave, so is the right side.
10h
awarded  Revival
11h
revised Subspace in 2D Help
typos
11h
comment Subspace in 2D Help
A curve will be a subset, but a subspace is a very special kind of subset.
12h
revised Basis and Linear Transformation Proving Problems
edited tags
12h
revised Verifier and Certificate for coNP SUBSET-SUM
typo in title
12h
answered An equality in some extension field
15h
comment An equality in some extension field
Start with $${f'(x)\over f(x)}=\sum{1\over x-\alpha_k}$$
17h
revised Antiderivative of $\exp(x^2)$
more informative title
1d
revised Numbers and the largest sum of divisors
corrected typo
1d
comment Finding minimum point of a function using linear algebra
$d_1$ and $d_2$ are the eigenvalues.
1d
comment Finding minimum point of a function using linear algebra
You want the eigenvalues. If they are both positive, then the form is never negative. But evidently it does take on the value zero, so that's the minimum. A more interesting question is, what is the minimum value of the form when restricted to the unit circle, and where is that minimum attained?
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answered Numbers and the largest sum of divisors
1d
revised Shortest path between two points via two disks
more informative title
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answered Separable polynomial and algebraic extension
1d
comment Completing the square, optimizing
Some of us don't like questions phrased as orders, and posted with no source, and no indication that any effort has been expended.