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JJacquelin

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44
Why does "$x^2 - 5x + 6 = 0$", which is the same as "$(x-3)(x-2) = 0$", represent a parabola?
math.stackexchange.com

28
Why is $e^\pi - \pi$ so close to $20$?
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26
Visually deceptive "proofs" which are mathematically wrong
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22
Polygamma function series: $\sum_{k=1}^{\infty }\left(\Psi^{(1)}(k)\right)^2$
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20
How do I prove that $3<\pi<4$?
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17
Limit of $\lim_{x\rightarrow 1}\sqrt{x-\sqrt[3]{x-\sqrt[4]{x-\sqrt[5]{x-.....}}}}$
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16
prove $\sum\limits_{n\geq 1} (-1)^{n+1}\frac{H_{\lfloor n/2\rfloor}}{n^3} = \zeta^2(2)/2-\frac{7}{4}\zeta(3)\log(2)$
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13
How can I solve the given equation?
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13
A closed form for: $\int_{0}^{\infty} \frac{1}{(x-\log x)^2}dx$
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13
fitting exponential decay with no initial guessing
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11
Rigorous proof that $dx dy=r\ dr\ d\theta$
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10
Approximating $\int_1^{10}x^x\mathrm dx$ to within 5% relative error
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10
Sphere equation given 4 points
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10
Fit exponential with constant
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9
Solutions to this fractional differential equation
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9
Surface area of a sphere with integration of disks
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9
Solve the Differential equation $\frac{dy}{dx}=\frac{1}{x^4}+y^2$
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9
Smooth floor function
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9
Parametric equations and specifications of a triskelion (triple spiral)
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9
Solution of the Beast in Disguise $y'=x-y^2$
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9
How many points are needed to uniquely define an ellipse?
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8
A variant of Heron's shortest distance problem (with three points instead of two)
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8
Solving an ODE without Lambert W function
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8
Finding $\int x^xdx$
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8
Fourier transform of complex Gamma function
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8
Fractional Calculus: Motivation and Foundations.
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8
$(2x-5y+3)dx=(2x+4y-6)dy$
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8
Inhomogeneous modified Bessel differential equation
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8
why area of triangle changes when measured as components of triangles?
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8
Solve $\frac{f'(x)f'''(x)}{(f''(x))^2}=C$
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