Marra

Brazil

Brazilian graduate student.

Jul
16
accepted On Stein manifolds and constant functions
Jul
16
comment On Stein manifolds and constant functions
Nice! Thank you.
Jul
16
asked On Stein manifolds and constant functions
Jul
10
comment Differential problem, how to get y''?
The one you already have, $\dfrac{dy}{dx} = \dfrac{-b^2x}{a^2y}$
Jul
10
comment Differential problem, how to get y''?
Differentiate on both sides the expression you have for the first derivative of $y$. You'll have an equation with a $\dfrac{dy}{dx}$. Just substitute the value you have for the first derivative. If you're having doubts on how to differentiate the quotient, check out the derivative properties, it's not hard.
Jul
2
awarded Inquisitive
Jul
2
awarded Curious
Jun
28
comment Show there exists a unique $f$ (in $\mathbb R^+$) such that $\frac{d}{dx}f(x)=f^{-1}(x)$
Try differentiating $f\circ f$.
Jun
26
accepted Can I construct an affine connection on a Riemannian manifold from arbitrary Christoffel Symbols?
Jun
26
asked Submersions define Foliations
Jun
20
comment do Carmo: near isolated zeros, killing field tangent to geodesic spheres
Could someone clarify this for me? What does $\dfrac{\partial}{\partial r_p}$ stands for? Thanks.
May
25
awarded Student
May
25
asked How is foliation of manifolds' theory useful in General Relativity?
May
24
comment Can I construct an affine connection on a Riemannian manifold from arbitrary Christoffel Symbols?
@user49048 isn't that already satisfied by the fact that they are smooth functions over the manifold (therefore, consistent under coordinate change?.
May
24
awarded Supporter
May
24
asked Can I construct an affine connection on a Riemannian manifold from arbitrary Christoffel Symbols?
May
16
accepted If $\Gamma^k_{ij}(p)=0$, then $\nabla_{E_i}E_j (p)=0?$
May
16
comment If $\Gamma^k_{ij}(p)=0$, then $\nabla_{E_i}E_j (p)=0?$
I'll check this later, I'm really sleepy right now. Thanks! :)
May
16
asked If $\Gamma^k_{ij}(p)=0$, then $\nabla_{E_i}E_j (p)=0?$
May
16
accepted Question on Normal Coordinates
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